ECM. Will not clear codes.

Tiny
SSR96
  • MEMBER
  • PONTIAC GRAND PRIX
Were working on a 93 grand prix. We had trouble clearing the codes so we purchanced a [u:2b7312d09d]new[/u:2b7312d09d] ecm and prom. The codes are. "Still there" What the "sonofa"
Are these codes being stored somewere else?

This cars been in the shop for a week and were stumped!

Any ideas. Anyone. Please.

Other then discounecting the ground wire or pulling the ecm fuse is there any other way.
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Friday, November 24th, 2006 AT 10:16 AM

2 Replies

Tiny
LSUSSEL
  • MEMBER
Try disconnecting the battery for 15 min. You can unplug either the red or black wire aslong as you break the curict. That should reset everything.
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Tuesday, November 28th, 2006 AT 11:49 PM
Tiny
SSR96
  • MEMBER
Update:
It seems it was the snap-on scanner that was sending us on the wild goose chase. We borrowed a tech1 from the dealer and there were NO codes.
We tried 3 Snap -on scanners and they all gave us false codes.
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Saturday, December 23rd, 2006 AT 8:20 PM

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