Help with EJ20R - engine cuts out if there's too much throttle, sensor issue?

[duncanm]

Thirdly, if I disconnect various sensors in the engine bay (i.e. AFM), it makes no difference whatsoever to how the engine runs.


Yep - that's what I was guessing. MAF isn't connected to ECU.

Check your engine harness and connections.. maybe buzz them out with a multimeter.

Could also be a dead MAF.

[alex-roflcopter]

Thirdly, if I disconnect various sensors in the engine bay (i.e. AFM), it makes no difference whatsoever to how the engine runs.


Yep - that's what I was guessing. MAF isn't connected to ECU.

Check your engine harness and connections.. maybe buzz them out with a multimeter.

Could also be a dead MAF.

Yeah I really need to track down a "known good" ECU pinout for the 87 ECU / EJ20R.

And ideally a wiring diagram for the complete harness, and ideally in English

Based on the fact that there are lots of wiring issues, I think that's more likely than a faulty MAF.
But if I can find another one the same while I'm at the wreckers over the weekend, I'll grab it for a spare.