Mechanics

WHAT HAPPENS IF THE FICM GETS GROUNDED WILL IT CAUSE THE TRUCK TO RUN BAD

2002 GMC Sierra • 185,000 miles

I just did a new short block and new injectors in my 2002 duramax and now number 2 and 7 are showing +15 and all the rest are showing -7 and I was wondering if I had the ficm grounded if it would cause this
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Davej7392
July 5, 2012.




Lets back up. Was this an issue prior to the engine replacement?

Roy

Nope I cracked a piston so I did a short block
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Tiny
Davej7392
Jul 5, 2012.
If it was grounded it would be on all not just 2. Did you have the injectors serviced while they were out?
Roy

They are brand new injectors the truck is in Limp Mode when it dose that and I was wondering if that the ficm being grounded could cause it to be in limp mode

Tiny
Davej7392
Jul 5, 2012.
Yes, it definitely could be. I would re check your wiring to confirm and let a shop with a scan tool verify this before throwing the ficm at it.

Roy

I have my own scan tool but the codes it sets off are just cause of the truck being in limp mode. Any thing else that would cause this that u can think of

Tiny
Davej7392
Jul 5, 2012.

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