missfire

[00 white lightn]

my lightning has a weird misfire, i put in a new set of plugs, same problem, changed the fuel filter, checked for vacume leaks, no problems found. I just installed a set of headers, i have a small leak on the drivers side, but i was told by my dyno tuner that this would not cause the low rpm misfire. It only does it under 2000 rpm. I pressure tested the coolant resevoir and it held pressure. So I am assuming i have no head gasket leak. Next is to check for injector faults or a bad coil pack. But I do not understand why i have no misfire codes yet when it is running bad. Does anyone have any ideas. I did a fuel injector flush to clean the injectors. It made no difference. I did run some water remover through the tank and it made some difference but it came right back. the next day.

 

[kevinm9529]

i would check injectors with a noid light to make sure each one is firing, inspect all wiring to injectors, also check camshaft position sensors, and crank shaft position sensor

 

[00 white lightn]

misfire

the problem wasnt the injectors. It was the coil pack boots and springs, you can buy a kit from advance auto for about 60 bucks. I recommend replacing these at every tune up.