1987 325 M20b27 electrical issuse?
Hello, Im new here and recently my 325 starting having intermittent problems with the engine randomly shutting off, at first i thought it was a problem with my fuel system and ive checked all that out with my Bently and Chilton books, my fuel system seems fine, i even replaced my fuel filter and my ignighter coil and it still had the problem.
Now come two weeks later and i havent really been driving it unless it was jus to the store and it would still randomly stall, but now it has gotten worse and it is no longer intermittent and just doesnt work.
Anyways getting to the point....I have no spark and i tested my Motronics with the table on the Bentlys Section 6 page 46, and the only thing that failed was the power supply to control unit on both pins 18 and 35, i got 0v, i checked my main and computer relays they seem fine, i tried swapping them with the other relays, i visually inspected my fuse box for bad fuses, those all seem to check out.
So i had a major intermittent problem that caused my engine to randomly shut off and it is no longer intermitten, I have fuel, no spark, no to voltage to my DME, relays and fuses SEEM fine, i havent tried buying new ones. I ohm tested my position and reference sensor by physically removing them and also testing the DME harness.
Im currently stuck, where do those two pins (18 and 35) get voltage from, and where does that get its voltage from? My DME isnt fried is it?
Ive checked for my reference pin.