I have a 1989 gmc s-15 with a 4.3 liter. Truck runs alright but is kind of sluggish on take off. Also when jumping on freeway i step on gas and it takes it a while to pick up speed. Revolutions go up

Asked by Apr 21, 2014 at 04:42 AM about the 1990 GMC S-15 2 Dr Sierra Classic Extended Cab SB

Question type: Maintenance & Repair

But it seems something is holding it
back. Changed sprk plugs,wires,fuel
filter , injectors and it seems to be the
same. Can anyone help

5 Answers


Have you checked the braking system? Could be the emergency brake is hanging up. After your next drive, try sprinkling water on the rotors and or rear drums. See if you get steam or rapid evaporation.

Its not the front or rear brakes already checked that


How about a compression test? Are you experiencing any oil consumption?

1 of 1 people found this helpful.

Xompression is fine and no oil consumption


Could the problem be the exhaust is plugged? Is the CEL on? I'm running out of idea's.

Your Answer


Looking for a Used S-15 in your area?

CarGurus has 7 nationwide S-15 listings and the tools to find you a great deal.


GMC S-15 Experts

  • #1
  • #1
    Bob Beaman
  • #1
    Larry Phillips
View All

Related Models For Sale

Used Chevrolet S-10
7 Great Deals out of 998 listings starting at $999
Used GMC Sonoma
335 listings starting at $1,695
Used GMC S-15 Jimmy
9 listings
Used Ford Ranger
119 Great Deals out of 4,676 listings starting at $1,495
Used Ford F-150
2,558 Great Deals out of 220,223 listings starting at $1,222
Used GMC Sierra 1500
887 Great Deals out of 59,331 listings starting at $1,980

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.