Ok, so I just had a GT40 fuel pump, 24lb injectors, new MAF, 75mm TB, 75mm Upper Intake Plenum, and Typhoon intake manifold installed and now my car is idling really rough. The car is tuned with a predator and also has a CAI, LT's, crossover pipe w/no cats, 40 series flows, and EGR delete, MSD coil packs, and has recently had the fuel filter, spark plugs, and front O2 sensors replaced. Not to mention a continuing list of other mods that have nothing to do with the car running. If anybody has any thoughts as to what I need to do to get things running right, Id appreciate the help.

 

First thing I would try is disconnecting the battery for a couple minutes.