hey guys got a 2002 Monte Carlo ss and it'll start up and run fine then when it gets warm it starts to backfire and stalls. any ideas?????

 

Mass Air Flow sensor... aka MAF... Either gets some Maf cleaner being careful to not touch the filament/ let air dry ... and replace it... Or try un pluging it...drive the car if it continues to run without stahling, Replace it with a new one. (AC Delco only)

Other wise...

Check fuel pressure at the fuel rail, possible clogged line/filter or failing fuel pump. Whens the last time you did a fuel filter change?

How many miles on it? what motor is in it?

 

^^^ Do this.

 

there's 268000 miles on it and 3.8 series 2 and fuel filter changed yesterday. has enough fuel going to motor my guess was maybe maf. my exhaust did get torn off by the flatbed truck. but didn't think that'd be the issue since it started stalling and backfiring before when the exhaust was still on.