I have two spare working coils, and also can trigger the coil at the ECU and get a strong spark. ECU will not supply spark in my car.tschultz wrote: ...Are you sure your coil is good? Should be easy to swap in from a different BMW of the era to test it...
Concentrate on verifying you have spark.
Then if it is still not working, verify that you have fuel...
Fuel is being supplied on start, and if I jumper Pins 30&87 at FP relay. Injectors are not firing, but here is where it gets interesting:
When jumpering pin 30 to both pins 87 at the main relay, one of my jumpers slipped, and I heard a buzz/hum from the engine. Turns out that supplying power to both 87 pins, then removing power from the pin that supplies power to the ECU results in my evap purge valve and the injectors (perhaps not all of them?) buzzing.
Video of buzzing: https://www.youtube.com/watch?v=GBrWnXKW3cs
So confusing...