Cold Startup Backfire

**chuckie669** · 11-19-2007, 04:41 PM

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,

**NvyBluMtlc02WS6** · 11-19-2007, 07:21 PM

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.

**chuckie669** · 11-20-2007, 03:19 AM

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.

**89LX** · 11-20-2007, 08:06 AM

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.

**chuckie669** · 11-20-2007, 03:13 PM

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).

**shady milkman** · 11-20-2007, 03:42 PM

i never herd of them having this backfiring prob.

**chuckie669** · 11-20-2007, 04:55 PM

I found this searching for it one day. You might notice some fellow ls1.com members

http://www.mfba.org/showthread.php?t=32454

**Smkn_TA** · 11-21-2007, 05:02 AM

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.