HELP!!! Severe Misfire Problems!
06 S/C, has 42k miles, injen intake, header/downpipe, stage 2. Car has been having problems for the last 10k miles, all 4 cylinders misfire at a random order, mostly at idle. the stage 2 was installed by dealer in hopes that it would be the fix, it wasnt of course. when i first had problems i figured that changing the plugs might help the problem, car has NGK BKR7E plugs as recommended by Intense Racing, still no fix. Dealership has given up on car saying that its my modifications that are causing the misfire. I dont see why my car is the only one having problems with mods. I know of other people with similar mods as mine or even more and have not heard of this porblem. The intake has been on the car since it had about 7k miles and problem didnt start till about 30k miles. Crank position sensor was replaced around this time. could this be the problem? I'm not sure where to start and I could REALLY USE HELP WITH THIS. Any info would be great and thanks for the help everyone.