89 gmc 2.5l

70

Asked by Sep 26, 2016 at 04:40 PM about the 1989 GMC Sierra

Question type: Maintenance & Repair

Put a new injector in my 89 gmc 2.5 liter
and its like the injector is stuck open and
dumps way to much fuel when I turn the
fuel pump on. What's causing it

3 Answers

66,505

The only thing that would cause dumping of fuel would be a bad fuel injector,or incorrect timeing.

6,755

Check fuel pressure, the fuel pressure regulator might be bad and creating excessive pressure

96,825

AAHH the infamous grounded injector driver in the 2.5 engines, I can't remember just how many of these I fixed in my years but every one except the one that burned itself up had a shorted injector driver in the ECM. replaced the ECM and they start and run as they always did.

Your Answer

Add photo

Related Questions

Sierra

Looking for a Used Sierra in your area?

CarGurus has thousands of nationwide listings and the tools to find you a great deal.

Postal Code:

Shortcuts

Search GMC Sierra Questions

GMC Sierra Experts

#1 Js08016
Js08016
Reputation 110
#1 dandyoun
dandyoun
Reputation 110
#3 John Saffrahn
John Saffrahn
Reputation 80
View All

Related Models For Sale

Used GMC Sierra 1500
196 Great Deals out of 9,231 listings starting at $2,995
Used Ford F-150
385 Great Deals out of 9,861 listings starting at $1,500
Used Chevrolet Camaro
791 listings starting at $2,500
Used GMC Sierra 2500
8 listings starting at $9,982

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.