Mechanics

WHY DOES MY ECM-A KEEP BLOWING OUT?

1999 Chevrolet Truck • 303,000 miles

I have a 1999 Chevy 3500 v8 2wd and my ECM-A keeps blowing out. I already changed out the fuel pump fuel relay and fuel filter with no luck. So what can it be. Thanks so much.
Avatar
Soto404
March 24, 2012.



You sure its the ECM-A fuse instead of ECM-1?

Rasmataz
Mar 24, 2012.
It's either one.

Tiny
Soto404
Mar 24, 2012.
You have a short circuit between the fuse to the computer-could be the pink wire is shorted directly to ground or one of the injectors is shorted out and dragging the rest down

Rasmataz
Mar 24, 2012.
Thanks

Tiny
Soto404
Mar 24, 2012.
Your welcome

Rasmataz
Mar 24, 2012.
You will need to check all ecm oup puts. If the resistance of a solenoid is to low it will pass to much current and take out the ecm driver on that circuit. Was the truck running well before the first ecm failed?

Djcl
Mar 24, 2012.
Yes the truck was running well before the first ECM failed.

Tiny
Soto404
Mar 25, 2012.
How did you determinethe first ecm was bad.

Djcl
Mar 25, 2012.
The fuse for ECM 1 was burned out and it didn't want to start anymore.

Tiny
Soto404
Mar 25, 2012.
Is it still blowing the fuse and when does it blow? As soon as you stick it in or when trying to start it or just turning the key. Are. Are you shore the ecm is bad or maby a fuse problem?

Djcl
Mar 25, 2012.