Absolutely stumped with the crank-no-start I've been struggling with for 3 weeks

[rogerscgreg]

I've ordered a new CPS (and coolant temp sensor while I was at it to help with the fault code).

Yes, no spark as the oscilloscope I had connected to the ignition coil showed no pulldown....

[rogerscgreg]

This is what I've been struggling with the most. Resistance is good and I have a waveform, I just wonder if that waveform is too weak. The gap at the sensor looked reasonable, but I didn't measure di...

[rogerscgreg]

Thanks, maybe I should just replace it. Are they available at auto parts stores nowadays? I couldn't find any with a quick search.

A friend of mine suggested it might be a compression issue...

[rogerscgreg]

I’ve verified continuity between pin 1 of the ECU and the ignition coil. There is no pulsing of any sort.

[rogerscgreg]

I have a 1987 BMW 325i (E30) that's been a race car for several years now. It uses Motronic 1.3, M20B25 engine. I'm been suffering from a crank-no-start condition for 3 weeks.

I'm going to...