Go Back   United Bimmer Community - BMW Forum > UnitedBimmer- Model Categories > E21, E30
Register FAQ Members List Calendar Advertise With Us Mark Forums Read

E21, E30 General discussion and technical help for 1975-1991 3 series cars.

Reply
 
Thread Tools
Old 10-29-2010, 12:30 AM   #1
berics

Name: berics
Title: United Newb
Status: Offline
Join Date: Sep 2010
Location: Washington
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.

Thanks!

Last edited by berics; 10-29-2010 at 12:32 AM..
  Reply With Quote
Old 11-01-2010, 11:06 AM   #2
Big Evil
 
Big Evil's Avatar

Name: Big Evil
Title: Moderator
Status: Offline
Join Date: Nov 2008
Location: Tempe, Az
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)
  Reply With Quote
Old 11-18-2010, 01:28 AM   #3
elijah

Name: elijah
Title: Read Only Club
Status: Offline
Join Date: Nov 2010
Location: United States
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.
  Reply With Quote
Old 11-18-2010, 12:02 PM   #4
berics

Name: berics
Title: United Newb
Status: Offline
Join Date: Sep 2010
Location: Washington
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!
  Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
E36 fuel pump: diagnosis & replacement Dudesky BMW OEM Parts Department DIY's & FAQ's 15 Yesterday 11:36 PM
No fuel at the rail? need help please phantomsys E46 2 06-10-2010 08:10 PM
1987 325 with Problems! NewBimmer E21, E30 4 11-06-2007 03:45 PM
1987 325 mitch500 Bmw Cars For Sale/Wanted 9 10-12-2006 01:15 AM
2002 325 Fuel Pump seth325 E46 1 05-30-2006 01:45 PM


All times are GMT -5. The time now is 09:39 PM.

A vBSkinworks Design

 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright © 2005-2013 UnitedBimmer.com