My 1994 945T cranks strongly, has spark, fuel at the rail, correct timing, but will not start. It gets 12v at the injectors, but neither noid light nor test light flashed on cranking. Swapped fuel relay and RSR, nothing. I swapped ECUs but no positive change - strangely the cooling fan came on as soon as it was plugged in (no key). I’ve run DTM 3 and could hear the injectors clicking. No codes. No start with starting fluid. The ballast resistor wiring seems a little hinky, I resoldered some of it - could that be causing a starting problem even though I get battery voltage at the injectors?

Some background: about two weeks before this happened, I replaced the rear seal. She started and ran fine for maybe a week, then slightly sluggish acceleration for a few days, then was not able to start one afternoon trying to head back to work. Could I have screwed something up that would take a week to show itself?

Additional background: two years ago she was hit at the driver’s front corner, and while being repaired required a bit of rewiring up there which was carried out by some jackleg with an electrical tape fetish who forgot to attach BOTH the ABS and the cooling fan wires. Started and ran fine until now, though…

I suppose the next step is to thoroughly check all the wiring involved. I have to a certain extent with diagrams and a multimeter but so far nothing seems amiss - what’s the best path forward at this point? Truly grateful for any help or suggestions!