Question

Sharaz508 · 06-06-2006, 10:28 PM

Would a clogged cat make my car backfire while driving and at idle?

jfunez · 06-07-2006, 03:14 AM

actually a clogged cat would actually make your car run like crap, even at idle ,specially under acceleration....If you could borrow a back pressure tester gauge from somebody you could get that possibility out of the way....Its easy to test..if you need any help let me know...

mrnickleye · 06-07-2006, 03:21 AM

Timing off can do it. An exhaust leak can do it. A sticking open injector can do it (raw gas down the exhaust).

Sharaz508 · 06-07-2006, 03:05 PM

it idles fine just back fires a little. But it does run like crap its a 5 speed and when i start to move the car starts bucking (and i no how 2 drive standerd). its does that till like 2000 rpm then it runs a little better but then after that it runs like shit agian. It back fires when im driveing to. But it does have an exhaust leak it needs an exaust pipe gasket but i dont think it would make it run this bad. Ill be going down the street then floor it and it will speed up but harrably. it cant be spark plug (irridium) or the plug wires becasue there where just changed recently.

Im ganna try and test the back pressure. what should it be?

mrnickleye · 06-07-2006, 08:31 PM

Well now you have given us more info. runs poorly, not just backfiring.

If its N/A, Cap & Rotor = replace !

Misfiring is your problem. Why is the question. Could be a lean fuel condition.

Sharaz508 · 06-08-2006, 01:47 AM

Quote:

Originally Posted by mrnickleye

Well now you have given us more info. runs poorly, not just backfiring.

If its N/A, Cap & Rotor = replace !

Misfiring is your problem. Why is the question. Could be a lean fuel condition.

How could i tell if its a lean fuel condion? and what should i do?

06-06-2006, 10:28 PM	#1
Sharaz508 Stock Join Date: Jun 2006 Location: Fall River MA Posts: 17	Question about clogged cat Would a clogged cat make my car backfire while driving and at idle? Last edited by Sharaz508; 06-07-2006 at 02:48 AM.

06-07-2006, 03:21 AM	#3
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	Timing off can do it. An exhaust leak can do it. A sticking open injector can do it (raw gas down the exhaust). __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

06-07-2006, 03:05 PM	#4
Sharaz508 Stock Join Date: Jun 2006 Location: Fall River MA Posts: 17	it idles fine just back fires a little. But it does run like crap its a 5 speed and when i start to move the car starts bucking (and i no how 2 drive standerd). its does that till like 2000 rpm then it runs a little better but then after that it runs like shit agian. It back fires when im driveing to. But it does have an exhaust leak it needs an exaust pipe gasket but i dont think it would make it run this bad. Ill be going down the street then floor it and it will speed up but harrably. it cant be spark plug (irridium) or the plug wires becasue there where just changed recently. Im ganna try and test the back pressure. what should it be? Last edited by Sharaz508; 06-07-2006 at 03:08 PM.

06-07-2006, 08:31 PM	#5
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	Well now you have given us more info. runs poorly, not just backfiring. If its N/A, Cap & Rotor = replace ! Misfiring is your problem. Why is the question. Could be a lean fuel condition. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

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06-07-2006, 03:14 AM	#2
jfunez 12psi boost Join Date: Oct 2005 Location: georgia,usa Posts: 338	actually a clogged cat would actually make your car run like crap, even at idle ,specially under acceleration....If you could borrow a back pressure tester gauge from somebody you could get that possibility out of the way....Its easy to test..if you need any help let me know...