I bought the engine without seeing it running so a day one problem for me. Im using a facelift ek4 sir harness. Loom seems fine. There is a dseries alternator on it, I dont think its the problem but I bought a bseries one recently so I will throw that on and see.Did the engine ever work properly or problem from day one
did you use the original car harness or the one that came with engine
check / shake all jacks and harness
It could be a bad harness
Also check your alternator
Ive a spare ECT sensor here, i'll throw that on next and see. I doubt its a sticking tb, ive cleaned mine anyway.I'm thinking throttle body maybe sticking
I'll burn yours if you burn mineI put a brand new ect sensor on and it seemed to have helped slightly but the problem is still there
It could very well be a valve not seating correctly or a headgasket failure between two cylinders. But what makes me think not is I've got solid even compression figures.It has to be air or intake related
Did you try the IAT on the intake arm?It has to be air or intake related
YeahIs that the plastic sensor that goes beside the breather pipe