Originally Posted by Digger84
Injectors clicking or injector harness flashing a test light?
spark at coil pack checked directly?
What was done to engine
Timing chain off a tooth or more
Have sentry key
change PCM from a different jeep?
Good gas ie adequate amount and no old crap gas or water in tank?
Injection of quality fuel in proper ratio plus adequate properly timed spark plus mechanically sound engine plus spinning engine + unobstructed air in and exhaust out = will start
Bought an ATK engine to replace old POS 4.0 came pre-timed, its getting spark and everything. Tried to set 1st cylinder to tdc last night then reinstall the camshaft sensor but it still was acting up. Some of my mechanic friends think it might be a bad sensor or its out 180*.
When i turn the key it will try to run and will shoot small flames out of the exhaust headers, and wont run