It could well be, I just wanna be sure that the next part that goes on this fixes it, if I had a day on it I reckon I’d probably get to the bottom of it.>>> high pressure fuel is erratic/unsteady when graphed at cranking speed <<<
Thats possibly your issue right there.
Give me a call if you want a sounding board.
I checked the waveform Hyundai have for the crank sensor thanks to Alldata (which I have to pay for myself as boss won’t) and the signal I get looks the same so I don’t think that’s the problem. I think as giving it fuel gets it going it is more likely a fuel issue as you suggest. I’ll rig the low pressure side gauge up again and get it running to make sure it’s maintaining pressure.
Can you think of anything else the ECU needs to see to trigger the injectors? The immobiliser light goes out but after about 20 seconds, not sure if that’s normal but as it goes out it’s probably ok, snap on read immobiliser and key is ok, borrowed Bosch KTS and wouldnt communicate with immobiliser. Thanks