89 gmc 2.5l

100

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

68,255

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

7,365

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

100,315

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

Sierra

Looking for a Used Sierra in your area?

CarGurus has 27 nationwide Sierra listings and the tools to find you a great deal.

ZIP:

GMC Sierra Experts

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

Related Models For Sale

Used GMC Sierra 1500
881 Great Deals out of 65,386 listings starting at $1,995
Used Ford F-150
2,281 Great Deals out of 181,524 listings starting at $1,000
Used GMC Sierra 2500
4 Great Deals out of 148 listings starting at $3,495
Used Chevrolet Camaro
405 Great Deals out of 30,566 listings starting at $3,550

Used Cars For Sale

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.