curiousity; might kill the dime

SJAS95s10 · 07-02-2008, 03:33 PM

i have a 95 with the 2.2l 4 cyl its my understanding that they need a lot of back pressure. now i bought the truck with a hollowed out cat and the truck runs rough and my buddy put his computer to it and it shows that the timing is flucuating at idle and it is rough. can this all be due to the cat convert or am i looking at getting a ECM. Any help is appreciated.

bmxatv10 · 07-02-2008, 03:35 PM

Quote: Originally Posted by SJAS95s10

i have a 95 with the 2.2l 4 cyl its my understanding that they need a lot of back pressure. now i bought the truck with a hollowed out cat and the truck runs rough and my buddy put his computer to it and it shows that the timing is flucuating at idle and it is rough. can this all be due to the cat convert or am i looking at getting a ECM. Any help is appreciated.

i seriously doubt its the cat, it shouldn't effect your timing fluctuating at idle... what kinda program did your buddy use to see this timing fluctuation at idle? just curious...

SJAS95s10 · 07-02-2008, 03:40 PM

he has a scanner and u can read the outputs as the car runs

quadrace13 · 07-03-2008, 06:47 PM

a 95 would not register a gutted cat, it only has one o2 sensor, before the cat.... the timing could be because of anything, any bad sensor or injector, or plug or wire... the timing is changing as a result to the crappy running, trying to level itself out.... MOST LIKELY but there is always a possibility that the cps is shot, doubt it tho

smirnoffmx · 07-04-2008, 06:50 PM

your truck doesnt need backpressure, that doesnt mean run it open but it doesnt need 4 turbo mufflers and the problem is def not the cat especially on a 95

***What?*** · 07-05-2008, 10:53 PM

do complete tuneup 1st

mechanicix · 07-05-2008, 11:17 PM

Quote: Originally Posted by What?

do complete tuneup 1st

X2, I dought the ECM is bad either. Probably a sensor, Keep in mind the timing is controlled by vacuum if it has a distributer, so check for a vacuum leak or sensor, a tune up might even fix your problem.

eljefino · 07-06-2008, 10:18 AM

You need back pressure for the EGR stuff to work right but EGR isn't called for at idle. (but it might be stuck OPEN, a crappy lopey idle is a pretty good indicator especially if it cruises okay.)

I agree with the tune up stuff and of course maybe a vacuum leak.

Van Dimed · 07-10-2008, 07:14 PM

back pressure on 2.2's seems to keep torque high but,
keeps hp will increase if you open up the exhaust.

Van Dimed · 07-10-2008, 07:54 PM

hp will increase if you open up the exhaust...

07-02-2008, 03:33 PM	#1
SJAS95s10 Registered User Age: 23 Join Date: Jun 2008 Posts: 18 Location: User is: OffLine	curiousity; might kill the dime i have a 95 with the 2.2l 4 cyl its my understanding that they need a lot of back pressure. now i bought the truck with a hollowed out cat and the truck runs rough and my buddy put his computer to it and it shows that the timing is flucuating at idle and it is rough. can this all be due to the cat convert or am i looking at getting a ECM. Any help is appreciated.
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07-02-2008, 03:35 PM	#2
bmxatv10 Chivalay Mane Age: 23 Join Date: Dec 2001 Posts: 937 Location: BFE South User is: OffLine	Re: curiousity; might kill the dime Quote: Originally Posted by SJAS95s10 i have a 95 with the 2.2l 4 cyl its my understanding that they need a lot of back pressure. now i bought the truck with a hollowed out cat and the truck runs rough and my buddy put his computer to it and it shows that the timing is flucuating at idle and it is rough. can this all be due to the cat convert or am i looking at getting a ECM. Any help is appreciated. i seriously doubt its the cat, it shouldn't effect your timing fluctuating at idle... what kinda program did your buddy use to see this timing fluctuation at idle? just curious...
	[Reply w/Quote]

07-02-2008, 03:40 PM	#3
SJAS95s10 Registered User Age: 23 Join Date: Jun 2008 Posts: 18 Location: User is: OffLine	Re: curiousity; might kill the dime he has a scanner and u can read the outputs as the car runs
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07-03-2008, 06:47 PM	#4
quadrace13 Registered User Join Date: Jun 2008 Posts: 1 Location: Long Island, NY User is: OffLine	Re: curiousity; might kill the dime a 95 would not register a gutted cat, it only has one o2 sensor, before the cat.... the timing could be because of anything, any bad sensor or injector, or plug or wire... the timing is changing as a result to the crappy running, trying to level itself out.... MOST LIKELY but there is always a possibility that the cps is shot, doubt it tho
	[Reply w/Quote]

07-04-2008, 06:50 PM	#5
smirnoffmx the village idiot Age: 19 Join Date: Sep 2007 Posts: 63 Location: User is: OffLine	Re: curiousity; might kill the dime your truck doesnt need backpressure, that doesnt mean run it open but it doesnt need 4 turbo mufflers and the problem is def not the cat especially on a 95
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07-05-2008, 11:17 PM	#7
mechanicix Registered User Age: 23 Join Date: Apr 2008 Posts: 371 Location: King User is: OffLine	Re: curiousity; might kill the dime Quote: Originally Posted by What? do complete tuneup 1st X2, I dought the ECM is bad either. Probably a sensor, Keep in mind the timing is controlled by vacuum if it has a distributer, so check for a vacuum leak or sensor, a tune up might even fix your problem. Last edited by mechanicix : 07-05-2008 at 11:18 PM.
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07-06-2008, 10:18 AM	#8
eljefino Registered User Age: 32 Join Date: Jun 2008 Posts: 44 Location: User is: OffLine	Re: curiousity; might kill the dime You need back pressure for the EGR stuff to work right but EGR isn't called for at idle. (but it might be stuck OPEN, a crappy lopey idle is a pretty good indicator especially if it cruises okay.) I agree with the tune up stuff and of course maybe a vacuum leak.
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07-10-2008, 07:14 PM	#9
Van Dimed Registered User Join Date: Mar 2008 Posts: 13 Location: langly british columbia User is: OffLine	Re: curiousity; might kill the dime back pressure on 2.2's seems to keep torque high but, keeps hp will increase if you open up the exhaust.
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07-10-2008, 07:54 PM	#10
Van Dimed Registered User Join Date: Mar 2008 Posts: 13 Location: langly british columbia User is: OffLine	Re: curiousity; might kill the dime hp will increase if you open up the exhaust...
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