Slight Backfire Problem After Breather Modification!
Thread Starter
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Joined: Jun 2004
Posts: 68
Likes: 1
From: Lumberton TX
Slight Backfire Problem After Breather Modification!
I cut my breather lid out and removed my mufflers and ran straight pipes. Now sometimes when I get on it, It will miss or have a slight backfire. It seems to be more common when it shifts into second gear at wot. A couple of weeks ago I had a code 32 (EGR) error. I have not had it lately though. Has anyone encountered this problem before? Seems to be some type of timing issue to me but I don't know. Also they started adding ethanol in our gas so I don't know if that could be an issue. I run 93 octane in my car and also add octane booster. Any help would be greatly appreciated. Thanks
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Switch brands of gas and stop running octane booster.
Higher octane fuels are harder to detonate. Your car will run just fine on premium and will not benefit from the booster so save the money. A stock LT1 also doesn't gain anything from the open air lid. It is only going to suck in as much air as the engine can use, no more. If you got an EGR code you might want to look into that. An EGR valve that is sticking open could cause the car to run like crap.
Higher octane fuels are harder to detonate. Your car will run just fine on premium and will not benefit from the booster so save the money. A stock LT1 also doesn't gain anything from the open air lid. It is only going to suck in as much air as the engine can use, no more. If you got an EGR code you might want to look into that. An EGR valve that is sticking open could cause the car to run like crap.
Burning Brakes
Joined: Jun 2003
Posts: 949
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From: smithtown ny
i also have that problem on my 91 vette i have a ton of bolt on's. but it backfires only when the car is cold then as it warms up it goes away. did it backfire before the mods?? how does the ecm come into this???
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Joined: Jun 2004
Posts: 68
Likes: 1
From: Lumberton TX
Originally Posted by Nathan Plemons
Switch brands of gas and stop running octane booster.
Higher octane fuels are harder to detonate. Your car will run just fine on premium and will not benefit from the booster so save the money. A stock LT1 also doesn't gain anything from the open air lid. It is only going to suck in as much air as the engine can use, no more. If you got an EGR code you might want to look into that. An EGR valve that is sticking open could cause the car to run like crap.
Higher octane fuels are harder to detonate. Your car will run just fine on premium and will not benefit from the booster so save the money. A stock LT1 also doesn't gain anything from the open air lid. It is only going to suck in as much air as the engine can use, no more. If you got an EGR code you might want to look into that. An EGR valve that is sticking open could cause the car to run like crap.
Originally Posted by 6spd
i also have that problem on my 91 vette i have a ton of bolt on's. but it backfires only when the car is cold then as it warms up it goes away. did it backfire before the mods?? how does the ecm come into this???
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From: Victoria BC
Originally Posted by KLLRVET
Did it start after you installed the plugs? Are the plugs Bosch platinums by chance?
