I have a 1987 e30 with computer number 0261 200 153. When i purchased the car back in april I was told it only needed a starter motor. It wasnt long before I realized that the altenator was junk too. After installing the two parts i noticed a static noise through the speakers only when cranking over the engine. After a few days of riding around town I started the car up and the idle was searching from 1000 rpm to 2500. I checked the idle motor for resistance and it was ok. My local EURO friend tested the computer of his e30 compared with mine and discovered it was all wrong. So I searched the junkyard database at my local yard and found a computer in PA for 85 bucks. I put it in and the damn thing ran beautiful. however 2 days ago the new (to me ) computer failed. I read on some forum on a google search that aftermarket starer motors have been known to cause problems due to poor remanufacturing. Everyone i talk to says that is bogus and to check my ground straps. I checked all my major grounds and they seem fine. The car has a history of cob wiring from previous owners. I decided to pull the aftermarket radio out tonight to find a rat's nest of electrial tape and spliced wires. after disconnecting the radio i started the car and the "static start" went away. I have no idea why my computers are failing. Hopefully i can figure this out before the car eats another one. If anyone has a computer with my number I can trade you for one out of my local yard or pay cash. Also Im new to the forum so if i did something wrong let me know. Thanks
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The sketchy wiring from previous owners makes for a tough diagnosis, all of the usual checkpoints may be good but something abnormal could be shorting the ECU or causing whatever the problem is. The only input I have is to check visually and with an ohm-meter, the ground on the passenger side strut tower which is for the ECU. As for being new, Welcome! and I suggest making a post in the "Parts Wanted" thread which should get you some leads on some affordable parts from other users very quickly.
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