Tell me about it, I thought it might be a damaged wire in the loom, Did a continuity test and a wiggle test one every wire, All is fine. At 1st I put it down to the EDIS4 but ive fitted 2 different ones and the fault is still there so it could only be the ECU or CPS, I have a funny feeling it could be down to the ECU. Im fitting my megasquirt soon so I hope it lasts until then, Just need to get a wideband lambda