why wont my bimmer run?

Question

the car is an 89 535i with motronic 1.1 injection i have replaced the ecu purely because that was what the previous owner said a bmw tech had told her was the problem . there is no spark i straight wired the coil and tested it and got spark . i checked the plug at the fuel pump and there is no power with the key on. i tried to get an ohm value on the crank sensor but could only get a reading on the car side of the plug .that read prety close to correct as per my haynes manual . im wondering how else to check my crank sensor . i already checked the gap between it and the harmonic balancer and its right. my latest problem is i have a new parasitic loss that drains the battery in about two days . any thoughts on that?

Answer 1

Jump the fuel pump relay, jump the auto shut down relay... If both of them were out at the same time also check the cam sensor as that will shut it down too... Jumping relays is as easy as looking at the side of the relay for connections and a paper clip...Also look for the ecm fuses and their condition... just cause they are connected doesn't mean they are good though....

Answer 2

You probably won't like the answer, but You need to have some diagnostics done with an electronics tester. Sounds like you are shotgunning the problem. These days a shop manual is a perfect place to start. Shorting stuff out to diagnose problems on old cars is ok, not so on newer stuff, you can reverse bias electronic circuits and blow them up.The person who told you the ECU was bad gave you some bum dope just to get you to guy the car. The short story is that with a shop manual you can go through the proper order of testing to find the root cause, sounds like you have tech knowledge, you just need a manual and of course as usual, some luck, best wishes.

Answer 3

have you tried the main relay yet?