runs rough

Asked by Feb 19, 2016 at 06:45 PM about the 1990 Chevrolet C/K 1500 RWD

Question type: Maintenance & Repair

90chevy 1500 4.3.runs fine when cold,but
when temp gets normal doing45mph it
loses power and hesitates when its under
load or try to accelerate

3 Answers


If there is a catalytic converter on there it may be getting plugged. Also dirty injectors may attribute to this, run some fuel injection cleaner threw the gas.

No cat did the cleaner trick no go


I would check for vacuum leaks, Is that a TBI on there? Also check the TBI base gasket. You can spray carb. cleaner like down the intake gasket, and at the TBI base gasket, rpm would pick up if there is a leak. 02 sensor could have a play in this.

Your Answer

C/K 1500

Looking for a Used C/K 1500 in your area?

CarGurus has 819 nationwide C/K 1500 listings starting at $2,600.


Chevrolet C/K 1500 Experts

  • #1
    Andrew Olsen
  • #2
    John Saffrahn
  • #3
View All

Related Models For Sale

Used GMC Sierra 1500
1,161 Great Deals out of 62,190 listings starting at $1,295
Used Ford F-150
3,116 Great Deals out of 231,599 listings starting at $1,300
Used Chevrolet C/K 2500
220 listings starting at $2,495
Used Chevrolet C/K 3500
182 listings starting at $4,875
Used Chevrolet Camaro
415 Great Deals out of 31,698 listings starting at $3,495
Used Chevrolet S-10
7 Great Deals out of 1,187 listings starting at $2,900

Used Cars For Sale

1998 Chevrolet C/K 1500 For Sale
148 listings starting at $3,995
1997 Chevrolet C/K 1500 For Sale
142 listings starting at $2,600

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.