You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!
If you have any problems with the registration process or your account login, please contact contact us.
E21, E30General discussion and technical help for 1975-1991 3 series cars.
User not setup in Rate My Car. Click here to set it up.
Your Ride: 1987 325
1987 325 Fuel Injector Fuse Blows
My 87 325 has 270,000 loving miles on it, but it has developed a mysterious problem. Here is the story. I bought a new radiator and wanted to take the car to my brother's wedding so my father-in-law installed it (although he has never worked on a BMW or a fuel-injected car) while I was at work. That seemed to go fine.
However, he adjusted the idle by screwing in the screw that pulls out the throttle cable (my wife didn't let it warm up and didn't like it hesitating when she pulled out of the driveway--arrrggh!). I returned it to its original position, but not until after returning from the wedding, and not until it started erratically revving. When first started it immediately revs to 2000 rpm; then after a few minutes it drops to normal and immediately revs to 2000. This takes place eternally, even while driving--which makes it pretty difficult to drive as you might imagine.
I replaced the idle control valve before realizing that the culprit is a blown 15A fuse for the fuel injection. For the life of me I can't figure out why it keeps popping. It blows immediately when I start the car. I even got one of those fuses that reset itself automatically and it just freaked the whole system out.
Any ideas? Can the ECU go bad and blow a fuse? I'd hate to replace it for no reason.
User not setup in Rate My Car. Click here to set it up.
Your Ride: 1994 BMW 525i, 1987 325is, 1986 325
If the fuse blows immediately when you start the car you have a hard fault to ground somewhere in the system and it blows as soon as the circuit is energized to protect the wiring. I'd be tracing the harness and looking to see if it got pinched somewhere during the radiator repair first, also put the idle screw back where it was.
__________________
Big Evil, The BMW driving monster of the American Southwest (Currently on BMW #5)
User not setup in Rate My Car. Click here to set it up.
Your Ride: BMW 316
Hi there! My friend had a similar issue over the fuel injector fuse and it's kinda troublesome. Well, my friend did brought his BMW to a nearby workshop and a mechanic suggested replacing the fuel injector. So he replaced it with a1 cardone fuel injector and a new fuse along with it. After that, my friend told me, the fuse never blows again. Hope this helps.
User not setup in Rate My Car. Click here to set it up.
Your Ride: 1987 325
Thank you guys. I still haven't tracked down the problem. The fuel injector replacement makes sense to me; but I was hoping there was something really, really cheap and simple. The wiring seems to be all intact, so I guess I will have to try the injectors.
Thank you.
I'm open to any other miracle cures, though!
10-28-2010, 11:30 PM
Similar Threads
