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Thread: Cold Startup Backfire
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11-19-2007, 04:41 PM #1
Cold Startup Backfire
Has anyone else had problems with their car backfiring on a cold startup?
If it's been sitting for awhile it will always give out one big pop, and then is usually done. I've gotten to where I let it sit for a min and then give it a rev to get it out of her system. It's done this since I brought it and has just gotten louder with mods/exhaust. Any tips or ideas?
Thanks,
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11-19-2007, 07:21 PM #2
- Join Date
- Oct 2006
- Location
- Florida
- Age
- 48
- Posts
- 262
Navy Blue Metallic- 2002 Trans Am WS6
I'm pretty sure it has something to do with the A.I.R. system on the 01 and 02 models. Mine does it too, but if i sit for like 5 min and let it warm up everything is ok.
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11-20-2007, 03:19 AM #3
Hmmm.... I forgot about that stupid piece. I took off both pipes when I changed my spark plugs, but I made sure to gasket them back. It popped before and after so I don't think I made it worse, but I'll have to look into that system some more.
And yeah, after 5 min sounds great.
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11-20-2007, 08:06 AM #4
lS1 Thing
Mine has always done what you describe. It lightened up after Hooker CB install. I let it warm at least a minute or so then drive.
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11-20-2007, 03:13 PM #5
Well at least I'm not the only one.
I let it sit for a minute this afternoon to warm up, then took off out the parking garage. Around the last corner it let out a backfire and this young chick almost crapped her pants (She jumped between two cars).
I think the only time I can ever enjoy the backfire is leaving the parking garage (usually sets off half the car alarms).
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11-20-2007, 03:42 PM #6
- Join Date
- Jan 2006
- Location
- Shepherd, Michigan
- Age
- 36
- Posts
- 11,770
blacker than wesleysnipes- 98' trans am
i never herd of them having this backfiring prob.
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11-20-2007, 04:55 PM #7
I found this searching for it one day. You might notice some fellow ls1.com members
http://www.mfba.org/showthread.php?t=32454
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11-21-2007, 05:02 AM #8
- Join Date
- May 2007
- Location
- Davenport, Iowa
- Age
- 35
- Posts
- 1,977
Bright Red- 1999 Trans Am Ws6
Mine sits out in the parking lot at work where the wind rips through, come morning I floor it down the alley way cold, man when I decelerate for the corner it sounds like a balloon popping party.
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