SPONSORED LINKS

1990 Pontiac Sunbird 90 Sunbird blows ECM fuse AND MORE

Tiny
JNSBILL
  • MEMBER
  • 1990 PONTIAC SUNBIRD
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 83,500 MILES
While driving car shuts off, replace the ECM fuse and it starts and drives until it blows the fuse again - no rhyme or reason to what makes it blow
Have looked for grounded wires, pulled on wires, tapped relays, banged on the ECM - can't "make it happen"
additional info - infrequently you go to start it and you get nothing - wait awhile and it will start -
NOT HOT STARTER will jumper
also car was overheated before ECM problem but No Start problem is older
Thoughts? Help? Direction?
SPONSORED LINKS
Tuesday, June 29th, 2010 AT 6:46 PM

1 Reply

Tiny
INTERNETMECHANIC
  • MECHANIC
  • 700 POSTS
Hi, thanks for the donation, usually when you donate one of the moderators will jump in. I'm not a moderator. Your fuel injector is on that same fuse circuit. I can't say the injector is faulty. It may not act up till it gets hot. You can do an ohms test on the injector, but, may not be conclusive? 1.6 to 2.0 ohms depending on litre size of engine. If it is way out of specs, replace the injector. There may be another issue, IF the ecm supplies ref voltage off that same fuse, any sensor or wiring circuit that uses ref voltage could be causing a problem? Any applicable trouble codes?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
-1
Wednesday, June 30th, 2010 AT 12:27 PM

Please login or register to post a reply.

Related Engine Computer Fuse Content

Engine Control Module (PCM) Fuse
VIDEO
Engine Control Module (PCM) Fuse
Instructional repair video
Engine Computer Fuse Fails
GUIDE
Engine Computer Fuse Fails
Each manufacturer designs their engine wiring systems a little differently, but one thing that stays the same is what an engine fuse supplies power to, such as the engine...
VIEW MORE

Sponsored links