if your having a mystery running like crap problem

[t-money22]

if you are having the mystery running like crap problem and seem like you have tried every thing to fix it this could be the problem.read all of it.

ive been going threw the same thing replacing part after part and shop after shop for past 6 months. very very frustrating feel like driving truck off cliff.

it seems like there is alot of peoples dimes f n up like that. it could be this there is a tsb for our trucks most gm dealers will tell you there isnt but there is its been basically a recall in cali. its about the csefi fuel injection that is on the 96 to 02 4.3 and on other motors.

it soundls like your truck is in the first stage of this problem it how mine started bout 6 months ago . my truck would hesitate really bad like the tranny was slipping or something and it would kindof come and go didnt happen all the time. 4 months later it started kind of kicken like it was missing or something.stated to hesitate more and started acting like it was missing. took it in to have tune up cap rotor plugs wires coil. and compression check for hell of it.didnt do to much 2 months after that started acting more and threw a ses light. shut off after a few miles took it to have it looked at they told me i was full of crap basically. light came on again after a few days started missing reaally bad took it to a tranny shop and threw the computer on it to check the code p0300 multiple random missfire. told me i had a tune up problem took it back to where i had it tuned up. of course light had shut of again the told me there wasnt any thing wrong with it said it came up with no code. i talked to like 3 or 4 shops and about 4 gm dealerships my truck is now ruuning really bad but a few days ago i cam across this and am switching the cspi aka csefi to the new mfi unit that is on the 2003 and newer vortecs.

this was out of a cali newspaper in 2003

The trouble-prone Sequential Central Port Injector (SCPI) fuel system was installed on GM's popular SUVs, pickup trucks and vans with 4.3L, 5.0L, and 5.7 liter engines. The defective fuel injection systems can cause GM owners to experience a "Service Engine Soon" light, misfires, rough idle, and hard start problems due to deposit build-up that cause poppet valves to stick and fail

CHECK THIS OUT here is the link to it http://www.arb.ca.gov/newsrel/nr021103.htm


took a lot of diggin there is a tsb for it the number is 99066g most gm dealers will tell you there isnt one. this is the link that shows you the tsb that i finally got a dealership to say there was after going to 4 of them.
http://www.talkabouttrucks.com/group...ges/71004.html

[jason_r83]

hmmm... the symptoms sound just like mine. I though about the injectors and I was fortunate to have a friend that worked at a parts store and warrantied the new injectors for my truck for free When I took off the intake plenum to replace them it was covered in gunk and raw gas. Is this normal? or is this the result of a leaking injector? thanks

[j894]

Thats for cali. only

[j894]

Here you go:
http://cgi.ebay.com/ebaymotors/4-3-v...21449634QQrdZ1

For about $65 shipped at the current price, you can have the lower intake manifold & the updated injector.

or heres the whole manifold
http://cgi.ebay.com/ebaymotors/GM-CH...21662332QQrdZ1

[t-money22]

from what it has sounded like to me it is kind of common. this could very likely be that frustrating, want to blow up truck. mystery problem.
because of a poor design. all that gunk and fuel in there is the deposit build up that can cause your poppet valves to stick in fail.

this info could save anyone some very frustrating times with there 1996-2002 dime

i want as many people to see this stuff as possible it was hard to come across and was kept pretty covered up. im pretty sure this problem has given 100s of thousands of people, very frustrating times and alot of money replacing stuff that might not have been needed to. go into both links the information is worth it save the links. gm knows about it and wants to keep it under wraps but i think every one should know.


The trouble-prone Sequential Central Port Injector (SCPI) fuel system was installed on GM's popular SUVs, pickup trucks and vans with 4.3L, 5.0L, and 5.7 liter engines. The defective fuel injection systems can cause GM owners to experience a "Service Engine Soon" light, misfires, rough idle, and hard start problems due to deposit build-up that cause poppet valves to stick and fail

HIGHLY RECOMENDED to any one with a 1996 to 2002 s10 with the 4.3
http://www.arb.ca.gov/newsrel/nr021103.htm

copyed directly off of tsb#99066g

This bulletin is being revised to emphasize to Dealers the important of
replacing the engine SCPI fuel assembly with the new MFI fuel assembly if
the vehicle has already received an injector cleaning. Please discard
Special Policy Bulletin Number 99066F, dated March, 2003

highly recomended also if your truck seems to have the poor running like crap mystery
http://www.talkabouttrucks.com/group...ges/71004.html

you can buy the new mfi assembley here i paid 245.00 shipped to my door for everything needed gm dealers bout $100 more and other places many places are back ordered. this place had em in stock dont know if they still do

http://www.parts4chevys.com/


OEM Catalog
INJECTOR 1 $177.58 OEM Catalog
BRACKET 1 $21.42 Mechanical Catalog - Chevrolet/Geo
Fuel system - Fuel induction - Intake - Seal kit SEAL KIT, S-Series, Lower, 4.3L 1996 - 2006 1 $23.42
Sub Total$222.42 Tax$0.00 Shipping$22.71 Handling Fee$0.00 Total $245.13
these are the part numbers

12568332
Assy, V6 Fuel Injector

88894355
Bracket, V6

17113215
Kit, V6 Seal

this stuff is gonna be put on this wednesday. if it gets here today like it is supposed to

i hope this helps a lot of people because because i know this mystery problem is very frustrating. and its not that expensive to try if it saves you from having to go threw those times that i know many of us have had.

[t-money22]

if it is doing it in cali it is doing it in other states they are only more concerened about it in cali because of emissions because it causes alot more pollution. it is a problem else where. you have to take the costs out of your own pocket though because most other places don have the air regulations like cali. take 15 min and take off your throttle and look inside it will be gunked up and dirty as crap.

[Crew Cab Sonoma]

Califonia mandates the use of oxygenated fuels, few other states do. so that could be part of the problem.

if GM issued a TSB for this, why would the dealers try to conceal it???
the dealership gets paid by GM for performing the repairs, so it wouldnt be in thier interest to try to deny it exists.....

[Crew Cab Sonoma]

BTW, looking down the throttle body will likely tell you nothing about the condition of your injectors... the "gunk and dirt you see are EGR and PCV system residues, and have no influence on the condition of your injectors....

also, the problems with the 96-02 "poppet" style injectors is well known here. not that it is as big of an issue as some would believe, but they are known to have problems occasionally, usually as the vehicles get over 80K miles or more...

i havent seen many 4.3 CSFI vehicles around here that have had injector issues, and i wouldnt hesitate to use the poppet style injectors in my truck again....

[Crew Cab Sonoma]

California is forcing GM to offer a 10 yr./200,000 mi. warranty on the CSFI injection system.... what a bunch of B.S.... if i were CEO of GM, i would respond by relocating any design and manufacuring operations to more buisness friendly states.....

[onecrazynoma]

[meyers2211]

whats required to do the swap if i buy the ugraded injectors and manifold and swap thats it? computer won't freak out?

[Crew Cab Sonoma]

the computer wont freak out... unless you try installing it on a 2.2....

[rob8284]

Quote: Originally Posted by meyers2211

whats required to do the swap if i buy the ugraded injectors and manifold and swap thats it? computer won't freak out?

"Plug and Play" install. Uses your existing manifold. It's just a redesign of the injectors/injection system. Too bad they don't offer higher flowing injectors with this new design.

[t-money22]

i know its not new to everyone who has been in here for a while cause i found a post back from 03 about it in here. thats what helped me find this other stuff. yes its not a problem for every truck but for the people that but for the people that have the problem with there truck running like crap its a problem. can you imagine your truck startig to run like crap, hesitate and missing. going threw replacing cap rotor plugs wires thinking regular maintnence 80,000 to 100,000 miles need it any way. dosent fix ur problem.then you go try fuel injection cleaners, fuel pumps, fuel pressure regulators thinking it might have a leak around the seal. and other stuff thinking it might be the problem and it dosent fix it. takeing your truck to countless shops. people are trying different things trying to get it fixed.and its not you wanna just drive the damn thing off of a cliff. its frustrating as all get out. all these peoples dimes are starting to hit over 80,000 and 100,000 miles now. thats when it can start to mess up like it did on mine. thats why cali made gm make warrenty 10 years 200,000 some people some people dont drive much it can take them 10 years to get to 80or 100 thousand miles. by that time they probably sell it get annother brand new vehicle. a dime lover could buy that truck with plans of baggin and draggin it just to start having running problems with it thinking regular maintnence wouldnt you like to know about this when this is mostlikely the fix. if you have replaced all normal tune up stuff why only clean out your system to temporarly fix it or replace the popits at 80 per popit that 500 just to replace the popits. when you can replace the whole system with the new mfi unit for half that for 245-300 with it not supposed to happen again. it is a proplem to the people that are having it and cant figure out whats wrong with there ride. we all in here love our dimes and we just want them to run right, look good. roll low and slow throwing sparks. goin fast. or riden high. what evers your flavor. we all have plans for our dimes but if regular stuff like that goes on. when your tryin to put all your time and money jus trying to fix your truck. and not puttin money into doin what you want to do to it. it sucks. the dime fans that have been in here for a few years yea you guys may know about it but the new people this stuff has been under for a few years and the problems are coming back up. the people newer to the dime world might not know about it and they should.

[j894]

I havnt had a problem myself, or know anyone around here with these trucks thats ever had problems with the newer injection system. the 92-95 CPI is a different story...

Why dont you go ahead & change it, be the guinea pig & see if it solves you problem?

i've seen several threads about the mutiple misfire code & alot of people came back later with other things causing the problem.

BTW just because the poppets can get clogged because of poor maintenance, doesnt mean that the injector needs to be replaced. I belive dealerships have a special cleaning proceedure.

[t-money22]

your right the pre 96 is a different story that set up is not the cspi aka csefi/csfi unit this is for the 96-2002 4.3. yes im putting on the new mfi 2003-current models tommorow, i just opened up my parts bout 10 min ago.
im going to do the top engine clean first though so every thing is clean before i install. not ever gm owner will experince these problems. but there being a technical service bullitin for it is a problem to many people.
this is directly out of the tsb
This bulletin is being revised to emphasize to Dealers the importance of
replacing the engine SCPI fuel assembly with the new MFI fuel assembly if
the vehicle has already received an injector cleaning. Please discard
Special Policy Bulletin Number 99066F, dated March, 2003

[t-money22]

my truck is a 2000 not a 95 or older and i am having this problem

[t-money22]

if you read the tsb it is for 96 threw 2002
http://www.talkabouttrucks.com/group...ges/71004.html

[02dime]

ya my 02dime has the same problem it feels like the tranny is slippin cuz it drops a gear and stays a 3500rpm doesnt go any faster just sits there,and even when im crusin at 30 km and giver it bogs but this has been going on for a while,i might just throw this v6 in the garbage and get a lt1 but hopefully i can fix it

[My95BOWTIE]

one of the CPI problems with the injectors is what caused my motor to hydralock and i had to get a new spider unit and a motor............tell me that wasnt a kick in the ass. now its startin to act up again.......i knew i shoulda put a carbed V8 in it while the motor was out

[Generic0]

The lt1 has its fair share of problembs also, can you say optispark?

[02dime]

so a carbed 383 would be the way to go,i can ripped those down in about an hour so maybe ill do that

[Chester_Lampwick]

Quote: Originally Posted by j894

I havnt had a problem myself, or know anyone around here with these trucks thats ever had problems with the newer injection system. the 92-95 CPI is a different story...

Why dont you go ahead & change it, be the guinea pig & see if it solves you problem?

i've seen several threads about the mutiple misfire code & alot of people came back later with other things causing the problem.

BTW just because the poppets can get clogged because of poor maintenance, doesnt mean that the injector needs to be replaced. I belive dealerships have a special cleaning proceedure.

Look, a lot of people do have this problem! They just have slightly different symptoms, and the problems are very inconsistant. You may start having problems starting your truck occasionally, so you replace the distributer cap and conincidentally the problem goes away. Maybe month later it'll be back. Maybe it's a clogged fuel filter, so you replace that. Then you replace the fuel pump, then every sensor. The dealership guys salavate every time you bring it in. Do they tell you about the service bulletin that covers these problems? No way! Don't kill the goose that lays the golden eggs.

When you take control and search for recalls and service bulletins you find out the "poppet" problem. Back to the dealership to do the "cleaning". Do they do as per the bulletin? No. So you still have the problem after spending half a dozen visits and $1000 or more.

So if this is the first time your having the problem, do yourself a favor and order these parts online:

12568332
Assy, V6 Fuel Injector

88894355
Bracket, V6

17113215
Kit, V6 Seal

For $250 bucks in parts, and an afternoon of your own labor you can put this problem behind you. I'm speculating because I have the parts, I just need the afternoon to install them.

See ya,
Roger

[Rhotpursuit]

Quote: Originally Posted by j894

BTW just because the poppets can get clogged because of poor maintenance, doesnt mean that the injector needs to be replaced. I belive dealerships have a special cleaning proceedure.
[/size]

Yes they do I p[osted it quite awhile ago. It involves a cleaner under pressure. BTW...it's not due to poor maintainence, but poor design.

[3.4blazerdude]

yea that intake manifold on the later s series trucks is a p#ss poor design, the injection assembly, and especially where the TB is. why didnt they put an intake on them similar to the later gen III and IV engine trucks have to begin with. Probably would have made more power and got better milage

[j894]

Quote: Originally Posted by Rhotpursuit

Yes they do I p[osted it quite awhile ago. It involves a cleaner under pressure. BTW...it's not due to poor maintainence, but poor design.

the earlier version in the 92-95 CPIs used poppets also. Dont hear a whole lot about clogged poppets causing running problems..

There is such a thing called fuel injector cleaner

[Rhotpursuit]

Here is a copy of the TSB regarding poppet cleaning.


Correct Solvent for SCPI Poppet Cleaning Procedure #99-06-04-006 - (02/12/1999)
Correct Solvent For CSFI Poppet Cleaning Procedure
1996-99 Chevrolet, GMC S/T, M/L, C/K, G, P Models

1996-99 Oldsmobile Bravada

1999 Cadillac Escalade

with 4.3L, 5.0L or 5.7L Engine (VINs X, W, M, R -- RPOs LF6, L35, L30, L31)

and All Transmission Types

Some technicians, when servicing 1996 and newer Truck CSFI (Central Sequential Fuel Injection) fuel systems (ref. Corporate Bulletin 87-65-07A), may be using an incorrect solvent when attempting to clean CSFI poppet valves.


Important
The ONLY solvent that will have any effect on the deposits occurring on poppet valves is: "PORT FUEL INJECTOR GASOLINE DETERGENT" (P/N 12345104) (IN CANADA USE P/N 12345515).


The use of Goodwrench "Fuel Injector Cleaner" (P/N 12346291), or any other "Fuel Injector Cleaner" is completely non-effective, and not appropriate for this concern.

Parts Information
Parts are currently available from GMSPO.



GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


© Copyright General Motors Corporation. All Rights Reserved.


I have a multiple page hardcopy of the procedure and parts required but no scanner.

[j894]

Quote: Originally Posted by 3.4blazerdude

yea that intake manifold on the later s series trucks is a p#ss poor design, the injection assembly, and especially where the TB is. why didnt they put an intake on them similar to the later gen III and IV engine trucks have to begin with. Probably would have made more power and got better milage

I dont whats more aggrivating having the POS manifold with the integrated injectoor assembly.

Or looking and seeing that they had a descent intake with fuel rails for 4.3 merc cruiser. They could of made out of aluminum, & used in production trucks. The marine intake was missing some provisions like, for the EGR, but nothing that couldnt be made. couple of guys on the fullsize forums did the marine converion on their v8s.

[Rhotpursuit]

I found it..

click..

[j894]

Link to the thread about the marine intake.

http://www.s10forum.com/forum/f107/interesting-marine-intake-on-ebay-253690/

[Chester_Lampwick]

Quote: Originally Posted by j894

the earlier version in the 92-95 CPIs used poppets also. Dont hear a whole lot about clogged poppets causing running problems..

There is such a thing called fuel injector cleaner

Yeah yeah. It doesn't really "solve" the problem but rather temporarily allieviates it. It gets expensive having to use a bottle every 1000 miles or so. Also, for me the poppets don't get clogged. They stick closed after the engine is turned off. So a couple cylinders don't get fuel when you try to start the engine. You can try repeatedly to start with no luck. Let the truck sit 15 minutes then it fires right up, and runs silky smooth. If it was a bad ignition system, or fuel pump, or fuel pump relay then occasionally the truck would die. It never does that. The poppets wont get stuck when they are being continuously pulsed. Only once the system pressure has bled down and it's had a few minutesfor the spring pressure to fully seat it does it stick.

Anyway, the truck won't throw any codes because the engine needs to run before it will test anything...... apparently all the technicians can do is read codes. I'd like to take a car with a hole in the block in to see if they notice a problem, I'm not sure if the ECU would show them a code.......

[t-money22]

i have the swap done i first i went and had a bg top system engine clean done first so everthing was clean before i changed the mfi kinda pointless to change parts if your other parts arnt clean that you arnt replacing. system was direckt plug in imight need to have the computer recalibrated taking it in in the morning. did get rid of p0300 code and its running way better. the mfi is quite a bit different they each have there own injector on the end of each line instead of having a little poppit ball that realease when there gets to be enough pressusre in the line. like the old scpi that can really mess some crap up when those stick. highly recomend having this done. if you wait to long it can cause other problems if drove on with this problem when it gets sever. thats to the point where i was. when its your only ride to get around and shops aare telling its gonna be a week before they can get it in it causes some problems. i had it replaced at a shop didnt have time to do it my self. as Rhotpursuit posted DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

waiting to long to replace this can cause some major problems if it gets bad enough it only gets worse. if you feel you have em take it in have it checked if they do there system clean and later and it comes back on to that problem get the parts and do the swap. before you risk f n up more crap on your motor.

[t-money22]

i found one of my other problems when the shop that worked on my truck plugged the maop sensor back in it bent the first prong over on it so it f**cked it up it wasnt connected right. thats why i dont like takin my shit to have other people work on it.

[chrisbrown19067]

I just did the csfi to MFI swap today. It only took an hour and i did use the old bracket which was fine. Unfortuanatly this swap didn't help my cold misfire. I DONT KNOW WHAT ELSE IT COULD BE! I am really thinking sticking valves. The truck runs fine with the MAP sensor unplugged.

[j894]

puts that to rest....

[SaltyOnionBalls]

Ok I am having the same problem.. I just replaced my fuel pump, distributor, cap and rotor and my truck still runs like shit.. It starts up a little rough, but it idles fine.. When I go to drive it, the exhaust is very loud and whistles (mainly because my y pipe is smashed to shit from draggin).. and the truck has NO power, it takes forever to get up to 40 mph and when I switch gears it chokes and after a few minutes of driving it chokes really bad in every gear.. I scanned the truck today and it threw up the 0300 code for the random misfire, what should I do to attempt to fix it?

[vespasoul]

Quote: Originally Posted by t-money22

if you are having the mystery running like crap problem and seem like you have tried every thing to fix it this could be the problem.read all of it.


took a lot of diggin there is a tsb for it the number is 99066g most gm dealers will tell you there isnt one. this is the link that shows you the tsb that i finally got a dealership to say there was after going to 4 of them.
http://www.talkabouttrucks.com/group...ges/71004.html

Re: on throttle bogging down

--------------------------------------------------------------------------------

ok, here is what i recently found
--------------------------------------------------------------------------------

File In Section: 06-Engine Emissions

Bulletin No.: 99066F

Date: March, 2003

SPECIAL POLICY

SUBJECT:
99066F - SPECIAL POLICY ADJUSTMENT - SEQUENTIAL CENTRAL PORT
FUEL INJECTION (SCPI) FAILURES IN CALIFORNIA ONLY (YF5
EMISSION EQUIPPED)



MODELS:
CERTAIN 1996, 1997, 1998, 1999, 2000, 2001, 2002 S/T, M/L, C/K, G,
P, W4/NPR TRUCKS AND 2003 NPR TRUCKS EQUIPPED WITH 4.3L
(RPO L35 - VIN CODE W OR RPO LF6 - VIN CODE X), 5.0L (RPO L30
- VIN CODE M) OR 5.7L (RPO L31 - VIN CODE R) ENGINE AND
CALIFORNIA EMISSION EQUIPPED (RPO YF5)



This bulletin is being revised to add the 2002 and 2003 model years to the SCPI Special Policy on certain S/T, M/L, C/K, G, P and W4/NPR truck models. Please discard Special Policy Bulletin Number 99066E, dated February, 2003.

CONDITION

Some customers of 1996, 1997, 1998, 1999, 2000, 2001, 2002 model year S/T, M/L, C/K, G, P, W4/NPR trucks and 2003 NPR trucks, that are registered in California, equipped with 4.3L (RPO L35 and VIN Code W, or RPO LF6 and VIN Code X), 5.0L (RPO L30 and VIN Code M) or 5.7L (RPO L31 and VIN Code R) engine, and California emissions (RPO YF5), may experience a "Service Engine Soon" light, misfire, rough idle or hard start due to a deposit build-up on the Sequential Central Port Fuel Injector (SCPI) poppet valve(s). The deposit build-up may cause injector poppets to stick closed. Certain fuels have been found to interact with the SCPI system to cause the deposits.

SPECIAL POLICY ADJUSTMENT

This special policy covers the SCPI failure condition described above for a period of ten (10) years or 200,000 miles, whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership.

The repairs will be made at no charge to the owner. This special policy applies ONLY to repairs requiring SCPI system servicing, injector cleaning and/or MFI assembly replacement of the SCPI system. The customer should not be charged for performing a system check when it is determined that the SCPI system is not the cause of a customer complaint (labor operation T5532 is provided to submit claims for such system checks). Any additional necessary diagnosis and repairs that are not related to the SCPI condition are not covered by this special policy. The customer should be informed that any further service that is not covered by new vehicle warranty will not be covered by this policy.

VEHICLES INVOLVED

Involved are certain 1996,1997,1998,1999, 2000, 2001, 2002 S/T, M/L, C/K, G, P, W4/NPR and 2003 NPR model vehicles, registered in California, equipped with 4.3L (RPO L35 - VIN Code W, or RPO LF6 - VIN Code X), 5.0L (RPO L30 - VIN Code M) or 5.7L (RPO L31 - VIN Code R) engine; and California emissions (RPO YF5). This Special Policy covers all vehicles within these model years, with these engine and emissions RPO's.

PARTS INFORMATION



Parts required to complete this special policy are to be obtained from General Motors Service Parts Operations (GMSPO). Please refer to your "involved vehicles listing" prior to ordering parts. Normal orders should be placed on a DRO Daily Replenishment Order. In an emergency, parts should be ordered on a CSO = Customer Special Order.

IMPORTANT :Isuzu Parts Ordering: In order to comply with the 10-digit Isuzu part numbering system, Isuzu dealers must add an "8" to the beginning and a "0" to the end of the listed 8-digit part numbers when ordering parts through AIPDN.



CUSTOMER NOTIFICATION






Customers will be notified of this special policy on their vehicles by General Motors (see copy of typical customer letter included with this bulletin - actual divisional letter may vary slightly).

SERVICE PROCEDURE

System Check: Use strategy-based diagnoses listed in the front of the Driveability and Emissionssection of the service manual. If the SCPI system is operating properly, inform the customer that the vehicle does not have the condition listed in the owner letter. If poor driveability conditions persist, inform the customer that any further diagnosis and repairs will be at their expense if the vehicle is outside the parameters of the new vehicle warranty.

SCPI Injector Cleaning Procedure: If diagnosis leads to sticking poppet nozzles, use the service procedure from Service Bulletin 00-06-04-003B to clean the SCPI poppet nozzles. Please note that the service bulletin term for SCPI is Central Sequential Fuel Injection (CSFI), but is referring to the same fuel system assembly. If the poppet nozzles have previously been cleaned and the sticking condition has reoccurred, refer to the correction paragraph below.

SCPI Fuel Tank Fill Pipe Assembly for 1997-99 M/L Van and 1999 - some 2000 C/K Truck: with 4.3L, 5.0L, 5.7L engines and built prior to listed VIN/Production dates on Service Bulletin 00-06-04-018: If diagnosis leads to sticking poppet nozzles on these models, use the service procedure from Service Bulletin 00-06-04-018 to replace the fuel tank fill pipe assembly, if this procedure has not been performed previously. Previous service procedure can be verified by checking GMVIS for Labor Operation L1065 on "M/L" trucks with replacement part number 15050573; or Labor Operation L1065 on "C/K" trucks with replacement part numbers 15747585 or 15747588.

Correction: If, after cleaning the SCPI poppet nozzles, the normal service manual diagnosis still indicates that the SCPI is the cause of the customer complaint, or if the injectors have previously been cleaned and the vehicle has again experienced sticking poppet nozzles, refer to Service Bulletin 00-06-04-003B and replace the SCPI fuel assembly with the MFI fuel assembly. Please note that the service bulletin term for SCPI is Central Sequential Fuel Injection (CSFI), but is referring to the same fuel system assembly.

CLAIM INFORMATION



For vehicles repaired under this special policy, submit a claim with the information indicated.

CUSTOMER REIMBURSEMENT

Customer requests for reimbursement are for any previously paid repairs to, or replacement of, the Sequential Central Port Fuel Injection (SCPI) system. Repairs must have occurred within 10 years of the date the vehicle was originally placed in service, or 200,000 miles, whichever occurs first. The requests are to be submitted within two (2) years of the date on which the repair was paid or within two (2) years of the date of this Special Policy Bulletin, whichever is greater.

When a customer requests reimbursement, they must provide the following:

-Proof of ownership at time of repair.

-Original paid receipt confirming the amount of unreimbursed repair expense(s) (including Service Contract deductibles), a description of the repair, and the person or entity performing the repair.



Customers from the State of California, must submit requests for reimbursement directly to (Divisions) per instructions in the owner letter.

If the work was done by someone other than a GM dealership, the amount of reimbursement will be limited to the amount that the repair would have cost GM to have it completed by a GM dealership.
_________________

In other words, because California sued GM, they get it free. The rest of us pay

[WalkGood]

Quote: Originally Posted by 96 Dime

Ok I am having the same problem.. I just replaced my fuel pump, distributor, cap and rotor and my truck still runs like shit.. It starts up a little rough, but it idles fine.. When I go to drive it, the exhaust is very loud and whistles (mainly because my y pipe is smashed to shit from draggin).. and the truck has NO power, it takes forever to get up to 40 mph and when I switch gears it chokes and after a few minutes of driving it chokes really bad in every gear.. I scanned the truck today and it threw up the 0300 code for the random misfire, what should I do to attempt to fix it?

A squashed exhaust pipe can restrict flow so much that the engine cannot breath properly and it runs with no power.

Missfires can make the engine run rich, clogging up the cat convertor.

Since you have a squashed y pipe, why not get a new free flow exhaust complete with hi flow cat convertor. Also replace your O2 sensors.

[SaltyOnionBalls]

Quote: Originally Posted by WalkGood

A squashed exhaust pipe can restrict flow so much that the engine cannot breath properly and it runs with no power.

Missfires can make the engine run rich, clogging up the cat convertor.

Since you have a squashed y pipe, why not get a new free flow exhaust complete with hi flow cat convertor. Also replace your O2 sensors.

How much we talking about here? lol

[WalkGood]

Quote: Originally Posted by 96 Dime

How much we talking about here? lol

How much ya got? :-)

[TECHRF]

is there a way to run our VIN's to see if it would apply to us. being in NY we have the same emmision code as Cali. I wonder if I print vespasoul post and bring to my deler what they will do. I don't care about the down time I just care about it running right.
found some other link(s) link 2
looks like Cali only. Bastards!
also found this replacement at bottom.

[SaltyOnionBalls]

Quote: Originally Posted by WalkGood

How much ya got? :-)

Not alot, ima mini trucker man haha.. Should I cut off the cat and clamp a straight pipe in its place? That would be alot cheaper, but would it perform as well or would I lose power?

[t-money22]

Quote: Originally Posted by j894

puts that to rest....

as i had said and some one else said. u should take it to a gm shop to have them diagnosis before you asume this is the problem this i was using this post to give people something that has been a comon failure on alot of gm owners vehicles that is trying to be hidden. one of the shops i toke mine to said that it sounds like there was some popits sticking and that when i had started doing the search and found the recall. i never said that this is the cause of every proplem that people are having if there truck is running like crap. this is a good place to start if you have been doing a lot of replacing stuff to try and fix a random missfire problem and poor running conditions. just because you j894 have not had the problem does not mean that no one else in the US has not had that problem

[Lowsonoma03]

wow i think i found the resolution to my problems with my truck!

[j894]

Quote: Originally Posted by t-money22

as i had said and some one else said. u should take it to a gm shop to have them diagnosis before you asume this is the problem this i was using this post to give people something that has been a comon failure on alot of gm owners vehicles that is trying to be hidden. one of the shops i toke mine to said that it sounds like there was some popits sticking and that when i had started doing the search and found the recall. i never said that this is the cause of every proplem that people are having if there truck is running like crap. this is a good place to start if you have been doing a lot of replacing stuff to try and fix a random missfire problem and poor running conditions. just because you j894 have not had the problem does not mean that no one else in the US has not had that problem

Well, I dont remeber saying No one else had that problem. I said, no one i know had that problem. as well as all the s10s & blazers I looked through, when looking for a new one.

Dont know why that service bulletin is being thrown up, like it was some sort of secret. You can look up the service bulletins online for free, with your VIN. Thats now the answer for every "running like crap" problem in the 262 forum, when it could be may other things like demostrated above.

[h82lose]

Quote: Originally Posted by 96 Dime

Should I cut off the cat and clamp a straight pipe in its place? That would be alot cheaper, but would it perform as well or would I lose power?

Why would you lose power by eliminating backpressure? To answer your question, you won't lose horsepower or torque. Why do domestic car owners always think that removing cats will cause them to lose torque?

Also, this looks like it might be happening to my dad's truck. I just did some searching about a water pump issue and found this thread by dumb luck. I have to say that you guys are definitely on to something with this service bulletin. My dad's truck has never run right since he's bought it. Only occasionally after tuning it up and other repairs. He even had the transmission rebuilt and I'm beginning to think that this fuel injection issue is more to blame for that problem. What engine code are you guys getting?

[556mm]

Quote: Originally Posted by Lowsonoma03

wow i think i found the resolution to my problems with my truck!

same here my truck has been running like crap lately and being kinda jerky

[WalkGood]

Quote: Originally Posted by h82lose

Why would you lose power by eliminating backpressure? To answer your question, you won't lose horsepower or torque. Why do domestic car owners always think that removing cats will cause them to lose torque?

In reality, yes an engine can make less power with too large of an exhaust system. At first glance, that doesn't sound right but yes it is true.

And NOT having a catalitic converter in a vehicle with a computer that "thinks" it is still there can make the engine run poorly. It might even default into "limp home mode" with a poorly adjusted fuel mixture and other engine management settings.

[BeyondeXtReMe]

ok so yesterday my truck started bucking and kicking like crazy then conked out, i had it towed home cuz it wouldnt start after that, this morning it started no problem, ran at idle for 5minutes (while i listened for the knocking and such again) then i rev'd it up a little and it conked out again, Am i experiencing this problem with scfi? it's an 02 4.3 5spd 105k kms.

[Strip9R]

Been watching this thread for a few weeks, while my truck got progressively worse and finally started losing lots of power last week. I didn't want to have to remove the Throttle Body to fix problem.

Since I had 171,400 miles on the truck i decided it needed a tune up anyway and I went with the following replacement parts.

coil
distributor cap&rotor
plugs&wires
air filter
pcv valve
3 Oxygen sensors
(STP) throttle body cleaner sprayed down inside of it.
Threw a new belt on it also.

Problem fixed, truck runs like new. Seriously
Money well spent $340.00 parts (i'm expecting gas mileage to increase)
O2 sensors are pricey for the 4.3L


Going to overhaul the tranny in a few weeks.
I plan on keeping this truck for the long haul.

Good luck guys and thanks to those who replied with different ideas of what this notorious problem could be.