WHY DOES MY ECM-A KEEP BLOWING OUT?

1999 Chevrolet Truck

Tiny

soto404

March, 24, 2012 AT 10:49 PM

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.

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10 Answers

Tiny

rasmataz

March, 24, 2012 AT 10:58 PM

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

Tiny

soto404

March, 24, 2012 AT 11:02 PM

It's either one.

Tiny

rasmataz

March, 24, 2012 AT 11:13 PM

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

Tiny

soto404

March, 24, 2012 AT 11:19 PM

Thanks

Tiny

rasmataz

March, 24, 2012 AT 11:21 PM

Your welcome

Tiny

djcl

March, 24, 2012 AT 11:54 PM

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?

Tiny

soto404

March, 25, 2012 AT 12:19 AM

Yes the truck was running well before the first ECM failed.

Tiny

djcl

March, 25, 2012 AT 12:26 AM

How did you determinethe first ecm was bad.

Tiny

soto404

March, 25, 2012 AT 12:34 AM

The fuse for ECM 1 was burned out and it didn't want to start anymore.

Tiny

djcl

March, 25, 2012 AT 12:42 AM

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?

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