It starts up and runs fine for about 5 min. until it warms up and then starts to stall, I can't keep it running, starts to backfire. I can smell the fuel after so I think itsignition related. About 5 months ago it was doing this so I replaced the coil with a cheapo and it ran fine until about 3 wks ago. Replaced coil again and it ran for 2 wks. with no probs. Bought an AC delco to replace cheapo but no luck. Have had the opti replaced about 2 yrs. ago, doesn't seem to be the same symptoms. Any help would be appreciated.
It's a 94 LT1 M6. borla cat back and headers. PC reprogrammed and emissions stuff was deleted.