1990 GMC Sierra low idle and stalling

Asked by Jun 27, 2015 at 10:13 AM about the 1990 GMC Sierra 1500 K1500 4WD Standard Cab LB

Question type: Maintenance & Repair

I have a 1990 k1500 low idle and
stalling problem, I replaced my fuel
filter and spark plugs, i changed the
fuel pump 3 years ago. Weird thing is
when I rev the engine the oil display
moves with the reving of the engine.
Any insight would be great

3 Answers

20,400

Check air filter and clean throttle body with throttle body cleaner. Add fuel injector cleaner to gas tank.

I clean the egr, idle valve, and the carburetor and it's not stalling any more, it is a little rough from idle to 20 mph..

20,400

Put in some fuel injector cleaner and take it out on the road and hit the passing gear a few times that will help clean injectors and carbon build up. Be careful no speeding tickets. Did you also check the air filter ?

Your Answer

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 64,157 nationwide Sierra 1500 listings starting at $999.

ZIP:

GMC Sierra 1500 Experts

  • #1
    dragonflyoffshore
    Reputation
    5,450
  • #2
    John Saffrahn
    Reputation
    3,780
  • #3
    Glenn Clingenpeel
    Reputation
    3,470
View All

Related Models For Sale

Used Ford F-150
3,129 Great Deals out of 218,985 listings starting at $1,200
Used Chevrolet Camaro
426 Great Deals out of 31,242 listings starting at $1,450

Used Cars For Sale

2018 GMC Sierra 1500 For Sale
25,604 listings starting at $24,499
2017 GMC Sierra 1500 For Sale
73 Great Deals out of 11,340 listings starting at $20,369
2016 GMC Sierra 1500 For Sale
166 Great Deals out of 4,045 listings starting at $16,404
2015 GMC Sierra 1500 For Sale
203 Great Deals out of 5,548 listings starting at $14,995
2014 GMC Sierra 1500 For Sale
199 Great Deals out of 4,894 listings starting at $9,900

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.