problem after headers!!

chaospartners · 10-07-2009, 11:45 PM

Well i bought the truck then brought it straight home and started tearing it apart and working on it, I got a set of of headers and put on it, and never hooked the smog pump back up, i just pluged the hole on the passenger side header where the smog pump was suppose to hook in. Well i took it and had new exhaust from headers back NO cat into a spintec pro street muffler. But now it wants to surg at an idle like when u come to a stop sign or something it will almost die but never does! Could this have something to do with not having alot of backpressure? ive did a complete tune up plugs,wires,cap,rotor,coil, pcv valve oil change, seafoam thru the intake off brake booster, and recently some lucas in the gas and still does it! i just wondering if any of u guys have had this problem or maybe knows what it could be.. Thanks

GarrikLoran · 10-08-2009, 06:28 PM

Replaced my headers as well and eliminated the smog pump by plugging the hole. The only difference between yours and mine is that I have a catalytic converter on mine. So its possible back pressure may be the issue in that case.

dusterbd13 · 10-08-2009, 06:29 PM

sounds like a vacuum leak. check for that first.

also, did you disconnect the wiring to the smog pump?

lastl, pull, clean, and adjust the iac.

michael

bobditts · 10-08-2009, 10:33 PM

did you touch the throttle control module at all?

chaospartners · 10-09-2009, 07:46 AM

Quote: Originally Posted by bobditts

did you touch the throttle control module at all?

Not shure i follow u there? and no i didnt unplug the pump?

bobditts · 10-09-2009, 11:36 AM

its not a pump. The TCM is connected to the TBI

chaospartners · 10-09-2009, 12:27 PM

its called a smog pump!! lol

bobditts · 10-09-2009, 02:57 PM

sorry. I had the wrong term. Its called a TPS (throttle positioning sensor). Depending what year blazer you have, you might have an adjustable TPS. Did you happen to bump it, or remove it during your tune up?

chaospartners · 10-09-2009, 05:35 PM

its a 91 S-10 no blazer here

bobditts · 10-09-2009, 08:52 PM

well same engine. you still havent answered my quesiton though. Im just trying to help you out.

chaospartners · 10-09-2009, 09:16 PM

I had the problem before the tune up. I dont recall messing with it!

chaospartners · 10-09-2009, 09:17 PM

maybe a picture of one so i know what im looking for? i feel stupid asking that cause im really not that illerate! lol

AHH AIR · 10-09-2009, 09:22 PM

i highly doubt that its because of the back pressure i have headers, no cat, and glass packed thrush's and i run fine

chaospartners · 10-09-2009, 09:28 PM

Quote: Originally Posted by AHH AIR

i highly doubt that its because of the back pressure i have headers, no cat, and glass packed thrush's and i run fine

Ok ill try to rule that out!

86roller · 10-10-2009, 02:30 AM

check engine light on??

chaospartners · 10-10-2009, 09:53 AM

bobditts · 10-10-2009, 02:01 PM

Quote: Originally Posted by chaospartners

maybe a picture of one so i know what im looking for? i feel stupid asking that cause im really not that illerate! lol

http://www.autozone.com/autozone/cat...dName=Duralast

chaospartners · 10-10-2009, 03:22 PM

Yea ill look later but i dont think i have an adjustable one..

chaospartners · 10-10-2009, 07:31 PM

OK!! yes i do have the same tps as u posted in the link above. But i dont see how i could have messed any thing up, or messed with adjustment any

bobditts · 10-10-2009, 07:39 PM

I would get out the old dmm and make sure it is still adjusted correctly. It makes a world of difference if the voltage is off.

dusterbd13 · 10-10-2009, 08:51 PM

Quote: Originally Posted by dusterbd13

sounds like a vacuum leak. check for that first.

also, did you disconnect the wiring to the smog pump?

lastl, pull, clean, and adjust the iac.

michael

so, have you checked the basics yet?
hiw about checking the timing? fuel filter?

michael

chaospartners · 10-10-2009, 11:29 PM

Quote: Originally Posted by dusterbd13

so, have you checked the basics yet?
hiw about checking the timing? fuel filter?

michael

Yes i put a new fuel filter and fuel pump on it in the begining. It really sounds like a vaccum problem but i can find it anywhere. Ive even takin the egr off and cleaned the ports. It does it the most when u just push in the clutch instead of down shiffing coming to a stop it will bog down and cut out and miss then pick back up rpm. If u dont shift and gradually bring down the rpms it wont do it near as bad? im going to get into it again tomorrow since i got the day off and see if i can figure it out! Any more suggestions will help. Thanks guys!!

chaospartners · 10-11-2009, 11:21 PM

Ok guys thanks for the help! I think i got it fixed, it was what i thought all along but counldnt find.. Just a small vaccum line pulled off! It hasnt done it since.

10-07-2009, 11:45 PM	#1
chaospartners Registered User Join Date: May 2007 Posts: 1,164 Location: Somewhere in Ohio User is: OffLine	problem after headers!! Well i bought the truck then brought it straight home and started tearing it apart and working on it, I got a set of of headers and put on it, and never hooked the smog pump back up, i just pluged the hole on the passenger side header where the smog pump was suppose to hook in. Well i took it and had new exhaust from headers back NO cat into a spintec pro street muffler. But now it wants to surg at an idle like when u come to a stop sign or something it will almost die but never does! Could this have something to do with not having alot of backpressure? ive did a complete tune up plugs,wires,cap,rotor,coil, pcv valve oil change, seafoam thru the intake off brake booster, and recently some lucas in the gas and still does it! i just wondering if any of u guys have had this problem or maybe knows what it could be.. Thanks
	[Reply w/Quote]

10-08-2009, 06:28 PM	#2
GarrikLoran Registered User Age: 25 Join Date: Jul 2009 Posts: 2 Location: User is: OffLine	Re: problem after headers!! Replaced my headers as well and eliminated the smog pump by plugging the hole. The only difference between yours and mine is that I have a catalytic converter on mine. So its possible back pressure may be the issue in that case.
	[Reply w/Quote]

10-08-2009, 06:29 PM	#3
dusterbd13 GRM Challenge Truck Age: 28 Join Date: Apr 2008 Posts: 306 Location: User is: OffLine	Re: problem after headers!! sounds like a vacuum leak. check for that first. also, did you disconnect the wiring to the smog pump? lastl, pull, clean, and adjust the iac. michael
	[Reply w/Quote]

10-08-2009, 10:33 PM	#4
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: problem after headers!! did you touch the throttle control module at all?
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10-09-2009, 07:46 AM	#5
chaospartners Registered User Join Date: May 2007 Posts: 1,164 Location: Somewhere in Ohio User is: OffLine	Re: problem after headers!! Quote: Originally Posted by bobditts did you touch the throttle control module at all? Not shure i follow u there? and no i didnt unplug the pump?
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10-09-2009, 11:36 AM	#6
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: problem after headers!! its not a pump. The TCM is connected to the TBI
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10-09-2009, 12:27 PM	#7
chaospartners Registered User Join Date: May 2007 Posts: 1,164 Location: Somewhere in Ohio User is: OffLine	Re: problem after headers!! its called a smog pump!! lol
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10-09-2009, 02:57 PM	#8
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: problem after headers!! sorry. I had the wrong term. Its called a TPS (throttle positioning sensor). Depending what year blazer you have, you might have an adjustable TPS. Did you happen to bump it, or remove it during your tune up?
	[Reply w/Quote]

10-09-2009, 05:35 PM	#9
chaospartners Registered User Join Date: May 2007 Posts: 1,164 Location: Somewhere in Ohio User is: OffLine	Re: problem after headers!! its a 91 S-10 no blazer here
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10-09-2009, 08:52 PM	#10
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: problem after headers!! well same engine. you still havent answered my quesiton though. Im just trying to help you out.
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10-09-2009, 09:16 PM	#11
chaospartners Registered User Join Date: May 2007 Posts: 1,164 Location: Somewhere in Ohio User is: OffLine	Re: problem after headers!! I had the problem before the tune up. I dont recall messing with it!
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10-09-2009, 09:17 PM	#12
chaospartners Registered User Join Date: May 2007 Posts: 1,164 Location: Somewhere in Ohio User is: OffLine	Re: problem after headers!! maybe a picture of one so i know what im looking for? i feel stupid asking that cause im really not that illerate! lol
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10-09-2009, 09:22 PM	#13
AHH AIR Subsonic Kustomz Age: 26 Join Date: Jan 2007 Posts: 319 Location: watervliet, mi User is: OffLine	Re: problem after headers!! i highly doubt that its because of the back pressure i have headers, no cat, and glass packed thrush's and i run fine
	[Reply w/Quote]

10-09-2009, 09:28 PM	#14
chaospartners Registered User Join Date: May 2007 Posts: 1,164 Location: Somewhere in Ohio User is: OffLine	Re: problem after headers!! Quote: Originally Posted by AHH AIR i highly doubt that its because of the back pressure i have headers, no cat, and glass packed thrush's and i run fine Ok ill try to rule that out!
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10-10-2009, 02:30 AM	#15
86roller Registered User Age: 26 Join Date: Jan 2008 Posts: 110 Location: Santa Paula User is: OffLine	Re: problem after headers!! check engine light on??
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10-10-2009, 09:53 AM	#16
chaospartners Registered User Join Date: May 2007 Posts: 1,164 Location: Somewhere in Ohio User is: OffLine	Re: problem after headers!! nop
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10-10-2009, 02:01 PM	#17
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: problem after headers!! Quote: Originally Posted by chaospartners maybe a picture of one so i know what im looking for? i feel stupid asking that cause im really not that illerate! lol http://www.autozone.com/autozone/cat...dName=Duralast
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10-10-2009, 03:22 PM	#18
chaospartners Registered User Join Date: May 2007 Posts: 1,164 Location: Somewhere in Ohio User is: OffLine	Re: problem after headers!! Yea ill look later but i dont think i have an adjustable one..
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10-10-2009, 07:31 PM	#19
chaospartners Registered User Join Date: May 2007 Posts: 1,164 Location: Somewhere in Ohio User is: OffLine	Re: problem after headers!! OK!! yes i do have the same tps as u posted in the link above. But i dont see how i could have messed any thing up, or messed with adjustment any
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10-10-2009, 07:39 PM	#20
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: problem after headers!! I would get out the old dmm and make sure it is still adjusted correctly. It makes a world of difference if the voltage is off.
	[Reply w/Quote]

10-10-2009, 08:51 PM	#21
dusterbd13 GRM Challenge Truck Age: 28 Join Date: Apr 2008 Posts: 306 Location: User is: OffLine	Re: problem after headers!! Quote: Originally Posted by dusterbd13 sounds like a vacuum leak. check for that first. also, did you disconnect the wiring to the smog pump? lastl, pull, clean, and adjust the iac. michael so, have you checked the basics yet? hiw about checking the timing? fuel filter? michael
	[Reply w/Quote]

10-10-2009, 11:29 PM	#22
chaospartners Registered User Join Date: May 2007 Posts: 1,164 Location: Somewhere in Ohio User is: OffLine	Re: problem after headers!! Quote: Originally Posted by dusterbd13 so, have you checked the basics yet? hiw about checking the timing? fuel filter? michael Yes i put a new fuel filter and fuel pump on it in the begining. It really sounds like a vaccum problem but i can find it anywhere. Ive even takin the egr off and cleaned the ports. It does it the most when u just push in the clutch instead of down shiffing coming to a stop it will bog down and cut out and miss then pick back up rpm. If u dont shift and gradually bring down the rpms it wont do it near as bad? im going to get into it again tomorrow since i got the day off and see if i can figure it out! Any more suggestions will help. Thanks guys!!
	[Reply w/Quote]

10-11-2009, 11:21 PM	#23
chaospartners Registered User Join Date: May 2007 Posts: 1,164 Location: Somewhere in Ohio User is: OffLine	Re: problem after headers!! Ok guys thanks for the help! I think i got it fixed, it was what i thought all along but counldnt find.. Just a small vaccum line pulled off! It hasnt done it since.
	[Reply w/Quote]