How do you know when you need a new Engine Control Module?

Asked by Sep 26, 2014 at 09:55 PM about the 1991 Pontiac 6000 4 Dr SE Sedan

Question type: Maintenance & Repair

The car runs good most of the time but will randomly refuse to idle, run really rough and
blow black smoke.

1 Answer

88,765

When you get an ECM failure code most of the time. There are exceptions. Have your system tested, it sounds like you could have some sensors malfunctioning ie O2, ECT, ACT, MAF, ISC, etc. Or possibly a vacuum leak. The codes should tell the story.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Search Pontiac 6000 Questions

Pontiac 6000 Experts

#1 sasser13
sasser13
Reputation 110
#2 littlehorn
littlehorn
Reputation 70
#3 Goodwrench707
Goodwrench707
Reputation 50
View All

Related Models For Sale

Used Buick Century
868 listings starting at $2,700

Used Cars For Sale