pdasterly

iTrader: (4)

brand new forged motor, new 42lbs bosch green top injectors. Car backfires out the exhaust badly on idle then died after big backfire

domeztikviolentz

u need a pcm tune before u drive it. cumputer is going bananas.....

Spoolin

iTrader: (8)

Have you done anything with the tune? Check your exhaust and make sure your O2 sensors are in and tight and you don't have any loose flanges. If your car is not tuned for the new 42# your gonna have a hard time with it, like your currently having.

pdasterly

iTrader: (4)

i swapped to stock injectors and changed the pcm and still backfiring

Spoolin

iTrader: (8)

Log the car while it's running and post up the log, you might have a bad O2 sensor.