So here is the deal, I have a good friend with a 1jz swapped 87 supra. Nothing specail just a stock 1jz swap bought from Jarco a while back. Recently it has started to run rough and break up at times. The issue has progressively gotten worse over time. When it starts to act up the tach will start jumping around, it causes spark plugs to gas foul, and will back fire. The car has brand new coil packs and the caps in the ecu have been replaced by driftmotion recently. We are thinking it could be either the cam/crank sensor loosing signal at times, or possibly the ignitor. So supramania I am asking you all what your thoughts on issue are.
Thanks
Thanks