Originally Posted by 89Saleen141
I was on a cruise with my friends and after a did a nice run and let off of the gas the car backfired. Is there something wrong with my air/fuel or is my timing off? Is this bad and how can this be fixed if it is. Usually I will get a little bit of popping in the exhaust but this was the first full out backfire.
Sounds like a possible fueling and/or timing issue.
Check your fuel pressure at idle with the vacuum line removed and plugged.
Check your timing and if you need to reset it don't forget to remove the spout connector first and replace it when you are done.
Popping in the exhaust could be from an exhaust system leak.
If it is before the O2 sensors it could also be the cause of fuel/air mix problems.