so my car is idling fine now and all but after adjusting everything my car is fackfiring alot...pretty much everytime rev up and let off and when im shifting gears. I am assuming i need to fool with the idle air screw...what should I do?

so my car is idling fine now and all but after adjusting everything my car is fackfiring alot...pretty much everytime rev up and let off and when im shifting gears. I am assuming i need to fool with the idle air screw...what should I do?

 

my 85 did the same thing. it turned out to be the pulse air injection system.

two marbles stuffed in the hoses fixed that problem.

I guess there is a reed valve of some kind in there that does not seal properly and allows the fresh air to get sucked into the exhaust on decel causing a backfire.

My EGR valve gasket is a little leaky and makes it backfire when I shut the motor off. Freaks out the gas station attendants. Plus, cool four foot flame out the back.

Wow im gonna go mess up my EGR Gasket so Mine Will do that

well its kind of a roar/multiple backfire/popping noise i guess you could say and it hapens consistantly whenever i let off the gas/shift.

Exhaust leaks (in the y-pipe), or bad ASV. Fix the leaks and/or block the ASV's with quarters to prevent fresh oxygen from getting in.

 

GD