2 weeks ago i took my car to the track, well on the last run, as i slowed down to turn back my car shut off and ever sense my stang has been backfiring.
could this be caused my a loose electrical fitting or a bad spark plug?

thnx guys/gals

 

What mods do you have? and I would start with pulling the plugs.

 

mods are a vortech sc, aquameth kit(built motor), bbk shorties,slp2 exhaust.hopefully by tonight,ill have time to check out the plugs