i have the 86 camaro, lg4. i just had heddman headers (no a.i.r.), y pipe, no cat, and 3" flowmaster cat back put on. the whole ride home, about 15 minutes, car was fine. time to test the new exhaust. so i did a few holeshots, and it sounded pretty good. driving away from my last burnout, the service engine light starts blinking rapidly, motor starts cutting out, and the fasten seat belts light blinked as well. i took my foot off the gas, and camaro idled like normal. put my foot on gas again, same thing. then it went away for a block, then did the same thing once more. i ***** footed it back home, about 2 mins of driving, and it was fine.
what could it be??? ses light went away right afterwards each time. it just blinked rapidly. the fasten belts light came on at the same time, but i was wearing my belt. the old a.i.r. vaccuum lines were plugged, and the plug wires do not appear to be rubbing the headers anywhere.
what could it be??? please help, this is my daily driver.

 

the o2 sensor wire is touching the boot on one of the spark plugs. could that be it??

 

well you also have a fasten seat belt light all at once so I would think there may just be some electrical gremlins. But for giggles did you check to see if a code was stored? While you are checking that. Go back over what you did and what could have been affected in the areas you worked

 

check battery cables and engine grounds,etc.The car isturning off and then turning back on as you are driving is my guess. Its auto right? On a manual youd get an insane bucking and jerking ride.