Okay,this car is a full bridge-port 6-port with a holley 650cfm,Holley regulator and Holley Blue Max fuel pump.Jay-tech intake,headers with straight exhaust,single exit.The stock EFI ignition is kept intact,with ECU that drives the ignition system.Here is the problem-----------whenever i turn on the lights,park or headlights the car bucks,backfires and would die.If the lights are off it is fine,but as soon as i turn them on --------RUN FOR COVER,it back fired so loud it blew the muffler apart.NOW WHAT?