Starting problem..any input?

Kaznlilgreenmen · 01-30-2009, 03:24 PM

Hey guys, so my story have an 01 jimmy..love it but it's havin some issues starting...I will sit and crank on it for a few seconds let off and do it again and it typically starts..sometimes takes a little more.. Now the story line..I have replaced the fuel filter o 4 5 months ago..about a month after replaced the fuel pump..I did not use the GM / Delphi one ya I was being a tight ass...about a week ago I replaced the cap and rotor..now I heard the blazer/jimmy's don't like cold weather..I will be testing the fuel pressure shortly to see what I'm lookin at that way..I also used to get a P440 code..but have not seen it recently *knock on wood*... Any suggestions or ideas what else might cause this? Thanks in advance!

Goran · 01-30-2009, 05:00 PM

might want to check your plugs that they aren't flooded...

my envoy would start tough after a long rain...

one morning it wouldn't start, tried 3 or 4 times/day for 3 days with no luck

we changed cap & rotor and wires/plugs.

the plugs were soaked and it never would have started...

after the tune up, never had any issues....

i'd try changing the wires/plugs

i live in canada where it's frequently -40 and she starts constantly after the tuneup

so it's not a cold issue

MikeInCtown · 02-02-2009, 02:54 PM

Just check fuel pressure and go from there. I've run into everything it seems with my S10 and right now the FPR or injectors is the only thing that could be causing a cold no start/hard start condition.

87c10slammer · 02-04-2009, 01:13 PM

i have replaced almost everything on my truck and it still is giving me shit when its below freezingout... i have repalced fuel pump, fuel filter, fpr, upgraded to mpfi, dizzy, cap, rotor, wires, coil, battery, a few sensors here and there. i hink there is more but anyways. what i have come to find out is that it could possibly be something to do with the secondary air intake system... the air pump goes bad and screws things up... i am getting a wait4me tune done and getting rid of that system in general so i wont have any issues with it... another poor gm design apperently...

cpolaris502 · 02-04-2009, 02:18 PM

Quote: Originally Posted by MikeInCtown

Just check fuel pressure and go from there. I've run into everything it seems with my S10 and right now the FPR or injectors is the only thing that could be causing a cold no start/hard start condition.

x2, the fuel pressure regulator seems to be common on these trucks to cause the starting issue.

Kaznlilgreenmen · 02-06-2009, 10:01 AM

Sorry for the long update..I tested fuel pressure..getting about 50, 55 psi approximately where it should be. I also put a bottle of techron fuel system cleaner in it and it seemed to be working fine for a few days then the problem came back...And the truck holds pressure once I turn the key off aswell.. so I'm kinda baffled..
So far I have not all in one shot but, replaced the cap and rotor, fuel pump, fuel filter, secondary air pump, relay and the check valve for the air pump. I'm about to drive this truck right up the guys ass I bought it from..

I don't mind workin on a truck but when its in the single digits and negative degree's and my truck don't start I'm gona get a lil upset..Guess next thing is look into plugs.. and wires

Kaznlilgreenmen · 02-06-2009, 10:07 AM

Quote: Originally Posted by 87c10slammer

i have replaced almost everything on my truck and it still is giving me shit when its below freezingout... i have repalced fuel pump, fuel filter, fpr, upgraded to mpfi, dizzy, cap, rotor, wires, coil, battery, a few sensors here and there. i hink there is more but anyways. what i have come to find out is that it could possibly be something to do with the secondary air intake system... the air pump goes bad and screws things up... i am getting a wait4me tune done and getting rid of that system in general so i wont have any issues with it... another poor gm design apperently...

Ya mine went bad what it is, is a tube that snakes around your engine compartment and the open part faces down in your engine bay near your left fender..so if you ever splash any water it runs the chance of going in there and freezing up the diaphragm in the solenoid..I re routed my tube up and zip tied it so the opening is always facing up..and I have not gotten any codes for that..so I don't think it is that..hoping atleast

87c10slammer · 02-06-2009, 01:31 PM

i ordered the tune and got rid of that system... for now im jsut gonna block off the main tube bt when it gets warmer im gonna order headers and take the whole system out... i need a new exhuast anyways so that will come in time before i have to get it inspected again

Kaznlilgreenmen · 02-06-2009, 02:01 PM

Quote: Originally Posted by 87c10slammer

i ordered the tune and got rid of that system... for now im jsut gonna block off the main tube bt when it gets warmer im gonna order headers and take the whole system out... i need a new exhuast anyways so that will come in time before i have to get it inspected again

i dunno if we are on the same page man...the secondary air pump is up in the front right area of the truck just two bolts and two plugs..nothin to do with any exhaust..

Kaznlilgreenmen · 02-06-2009, 02:02 PM

so did some more digging while at work (joys of workin at a shop)

there is a TSB out for this issue.. Hope this helps some of you other guys out as well..

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.

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.

87c10slammer · 02-06-2009, 02:53 PM

the secondary air system recarculates exhuast back into the intake... the sytem on my truck maybe a little different from yours being i have an 00 jimmy and you have a pickup... there are a few differences ad im pretty sure its one of them... my pump is right below my balancer pulley right nxt to the oil filter...

Kaznlilgreenmen · 02-10-2009, 09:23 AM

Quote: Originally Posted by 87c10slammer

the secondary air system recarculates exhuast back into the intake... the sytem on my truck maybe a little different from yours being i have an 00 jimmy and you have a pickup... there are a few differences ad im pretty sure its one of them... my pump is right below my balancer pulley right nxt to the oil filter...

Nah man I have a 2001 jimmy SUV heh

And I know its technically under the battery tray looking from the top...I replaced the pump, the valve and relay.

Kaznlilgreenmen · 02-10-2009, 09:29 AM

UPDATE

So after reading into my problem a little more one of the techs at my shop had an extra can of fuel injector cleaner. It not that stuff you toss in your gas tank, this is a cleaner that gets put into a purge system, and hooked up to your schrader valve and an air line. You kill your fuel pump (I pulled the relay) And you restart the truck and run this stuff through it..so far *knock on wood* this seems to have fixed my problem. Hope this helps some of you guys..

01-30-2009, 03:24 PM	#1
Kaznlilgreenmen I piss excellence Age: 25 Join Date: Oct 2004 Posts: 850 Location: Springville Ny User is: OffLine	Starting problem..any input? Hey guys, so my story have an 01 jimmy..love it but it's havin some issues starting...I will sit and crank on it for a few seconds let off and do it again and it typically starts..sometimes takes a little more.. Now the story line..I have replaced the fuel filter o 4 5 months ago..about a month after replaced the fuel pump..I did not use the GM / Delphi one ya I was being a tight ass...about a week ago I replaced the cap and rotor..now I heard the blazer/jimmy's don't like cold weather..I will be testing the fuel pressure shortly to see what I'm lookin at that way..I also used to get a P440 code..but have not seen it recently knock on wood... Any suggestions or ideas what else might cause this? Thanks in advance!
	[Reply w/Quote]

01-30-2009, 05:00 PM	#2
Goran Registered User Join Date: Apr 2006 Posts: 191 Location: Ontario User is: OffLine	Re: Starting problem..any input? might want to check your plugs that they aren't flooded... my envoy would start tough after a long rain... one morning it wouldn't start, tried 3 or 4 times/day for 3 days with no luck we changed cap & rotor and wires/plugs. the plugs were soaked and it never would have started... after the tune up, never had any issues.... i'd try changing the wires/plugs i live in canada where it's frequently -40 and she starts constantly after the tuneup so it's not a cold issue Last edited by Goran : 01-30-2009 at 05:01 PM.
	[Reply w/Quote]

02-02-2009, 02:54 PM	#3
MikeInCtown Registered User Age: 35 Join Date: Feb 2008 Posts: 927 Location: User is: OffLine	Re: Starting problem..any input? Just check fuel pressure and go from there. I've run into everything it seems with my S10 and right now the FPR or injectors is the only thing that could be causing a cold no start/hard start condition.
	[Reply w/Quote]

02-04-2009, 01:13 PM	#4
87c10slammer Registered User Age: 25 Join Date: Jul 2008 Posts: 391 Location: User is: OffLine	Re: Starting problem..any input? i have replaced almost everything on my truck and it still is giving me shit when its below freezingout... i have repalced fuel pump, fuel filter, fpr, upgraded to mpfi, dizzy, cap, rotor, wires, coil, battery, a few sensors here and there. i hink there is more but anyways. what i have come to find out is that it could possibly be something to do with the secondary air intake system... the air pump goes bad and screws things up... i am getting a wait4me tune done and getting rid of that system in general so i wont have any issues with it... another poor gm design apperently...
	[Reply w/Quote]

02-04-2009, 02:18 PM	#5
cpolaris502 The Dreamsicle Age: 20 Join Date: Jul 2005 Posts: 16,054 Location: Rogers, MN User is: Online	Re: Starting problem..any input? Quote: Originally Posted by MikeInCtown Just check fuel pressure and go from there. I've run into everything it seems with my S10 and right now the FPR or injectors is the only thing that could be causing a cold no start/hard start condition. x2, the fuel pressure regulator seems to be common on these trucks to cause the starting issue.
	[Reply w/Quote]

02-06-2009, 10:01 AM	#6
Kaznlilgreenmen I piss excellence Age: 25 Join Date: Oct 2004 Posts: 850 Location: Springville Ny User is: OffLine	Re: Starting problem..any input? Sorry for the long update..I tested fuel pressure..getting about 50, 55 psi approximately where it should be. I also put a bottle of techron fuel system cleaner in it and it seemed to be working fine for a few days then the problem came back...And the truck holds pressure once I turn the key off aswell.. so I'm kinda baffled.. So far I have not all in one shot but, replaced the cap and rotor, fuel pump, fuel filter, secondary air pump, relay and the check valve for the air pump. I'm about to drive this truck right up the guys ass I bought it from.. I don't mind workin on a truck but when its in the single digits and negative degree's and my truck don't start I'm gona get a lil upset..Guess next thing is look into plugs.. and wires
	[Reply w/Quote]

02-06-2009, 10:07 AM	#7
Kaznlilgreenmen I piss excellence Age: 25 Join Date: Oct 2004 Posts: 850 Location: Springville Ny User is: OffLine	Re: Starting problem..any input? Quote: Originally Posted by 87c10slammer i have replaced almost everything on my truck and it still is giving me shit when its below freezingout... i have repalced fuel pump, fuel filter, fpr, upgraded to mpfi, dizzy, cap, rotor, wires, coil, battery, a few sensors here and there. i hink there is more but anyways. what i have come to find out is that it could possibly be something to do with the secondary air intake system... the air pump goes bad and screws things up... i am getting a wait4me tune done and getting rid of that system in general so i wont have any issues with it... another poor gm design apperently... Ya mine went bad what it is, is a tube that snakes around your engine compartment and the open part faces down in your engine bay near your left fender..so if you ever splash any water it runs the chance of going in there and freezing up the diaphragm in the solenoid..I re routed my tube up and zip tied it so the opening is always facing up..and I have not gotten any codes for that..so I don't think it is that..hoping atleast
	[Reply w/Quote]

02-06-2009, 01:31 PM	#8
87c10slammer Registered User Age: 25 Join Date: Jul 2008 Posts: 391 Location: User is: OffLine	Re: Starting problem..any input? i ordered the tune and got rid of that system... for now im jsut gonna block off the main tube bt when it gets warmer im gonna order headers and take the whole system out... i need a new exhuast anyways so that will come in time before i have to get it inspected again
	[Reply w/Quote]

02-06-2009, 02:01 PM	#9
Kaznlilgreenmen I piss excellence Age: 25 Join Date: Oct 2004 Posts: 850 Location: Springville Ny User is: OffLine	Re: Starting problem..any input? Quote: Originally Posted by 87c10slammer i ordered the tune and got rid of that system... for now im jsut gonna block off the main tube bt when it gets warmer im gonna order headers and take the whole system out... i need a new exhuast anyways so that will come in time before i have to get it inspected again i dunno if we are on the same page man...the secondary air pump is up in the front right area of the truck just two bolts and two plugs..nothin to do with any exhaust..
	[Reply w/Quote]

02-06-2009, 02:02 PM	#10
Kaznlilgreenmen I piss excellence Age: 25 Join Date: Oct 2004 Posts: 850 Location: Springville Ny User is: OffLine	Re: Starting problem..any input? so did some more digging while at work (joys of workin at a shop) there is a TSB out for this issue.. Hope this helps some of you other guys out as well.. 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. 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.
	[Reply w/Quote]

02-06-2009, 02:53 PM	#11
87c10slammer Registered User Age: 25 Join Date: Jul 2008 Posts: 391 Location: User is: OffLine	Re: Starting problem..any input? the secondary air system recarculates exhuast back into the intake... the sytem on my truck maybe a little different from yours being i have an 00 jimmy and you have a pickup... there are a few differences ad im pretty sure its one of them... my pump is right below my balancer pulley right nxt to the oil filter...
	[Reply w/Quote]

02-10-2009, 09:23 AM	#12
Kaznlilgreenmen I piss excellence Age: 25 Join Date: Oct 2004 Posts: 850 Location: Springville Ny User is: OffLine	Re: Starting problem..any input? Quote: Originally Posted by 87c10slammer the secondary air system recarculates exhuast back into the intake... the sytem on my truck maybe a little different from yours being i have an 00 jimmy and you have a pickup... there are a few differences ad im pretty sure its one of them... my pump is right below my balancer pulley right nxt to the oil filter... Nah man I have a 2001 jimmy SUV heh And I know its technically under the battery tray looking from the top...I replaced the pump, the valve and relay. Last edited by Kaznlilgreenmen : 02-10-2009 at 09:30 AM.
	[Reply w/Quote]

02-10-2009, 09:29 AM	#13
Kaznlilgreenmen I piss excellence Age: 25 Join Date: Oct 2004 Posts: 850 Location: Springville Ny User is: OffLine	Re: Starting problem..any input? UPDATE So after reading into my problem a little more one of the techs at my shop had an extra can of fuel injector cleaner. It not that stuff you toss in your gas tank, this is a cleaner that gets put into a purge system, and hooked up to your schrader valve and an air line. You kill your fuel pump (I pulled the relay) And you restart the truck and run this stuff through it..so far knock on wood this seems to have fixed my problem. Hope this helps some of you guys..
	[Reply w/Quote]