the only time i hear my camaro backfire is when i have it in park and rev it up... after i rev it up and right when it starts to idle down it backfires... like right after i let off the gas... what would cause that? btw, im not a good mechanic... i use the haynes repair manual for help lol

 

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if my car hasn't warmed up for a couple of minutes it does the same thing.

 

My car does the same thing. Does anybody know why?

 

Sorry, I don't have a solution but I wanted to chime in: mine's doing the same thing. I created a post that has more details but it's driving me insane cos I'm also running rich (smells bad) and getting poor mileage

 

backfiring through the carb (or if FI intake) or exhaust? through carb/intake is a lean condition and through the exhust is a rich condition. after we know that and you induction (carb, TPI TBI), people will be able to help you better.

 

back fires are cool... esp if theres mad fire yo.. but uh more details would help

 

Mine does it too. Only in park while revving it (350 TPI). It's more of a pop from the exhaust than a loud backfire. I can say that I have had almost new cars before that have done the same thing. My GTA does run rich though, I know I probably need to change my plugs.

 

retarted timing

valve float-springs

hei-not very powerfull at high rpms without some help

 

My car is a 85 TA with non computer controled carb and vacuum advanced HEI distributor. My car is also running a bit rich. You can smell it in the exhaust. I set my timing back to the number 4 on the tab but it still does the same thing. Also all the polution cantrol junk and cat are gone. Thanks for the help.

 

my 85 IROC w/carbed 350 was popping through the carb when i messed up and ran 87 through it. i decided not to retard the timing and chose to just run premium.