runs rough

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

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

43,015

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

43,015

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

Add photo

Related Questions

  • Idleing rough 2 answers

    I have 1999 chevy silverado with 5.7. Motor runs smooth until you come to a stop. The idle drops to barely running and is rough. Take off and runs well. Why is it running rough at a stop

    1999 Chevrolet C/K 1500 LS 4WD

    -

    Maintenance & Repair

  • Rough Idle/Stalling 4 answers

    ***NOVICE*** Hey I've got a 93 K1500 5.0 V8. Started idling rough about a week ago, would sometimes stall at stop lights. RPM would drop as low as 500. Replaced the fuel filter at the suggestion of...

    1993 Chevrolet C/K 1500 Silverado Standard Cab SB 4WD

    -

    Maintenance & Repair

  • 97 Chevy C1500 idles great, runs rough when put in gear 10 answers

    I've got a '97 C1500 that's been running great for me for the past 6 months. Just the other day I drove it down to my folks place and when I pulled in the driveway the engine started running rough. ...

    1997 Chevrolet C/K 1500 Cheyenne Standard Cab Stepside SB 4WD

    -

    Maintenance & Repair

  • i have a 1997 chevy c-1500, its running rough all of a sudden! at a stand still or low idle, it shakes a bit and makes a popping/bang noise.after you gain some speed it smooths out a little, help!!!!! 1 answer

    i have a 1997 chevy c-1500, its running rough all of a sudden! at a stand still or low idle, it shakes a bit and makes a popping/bang noise.after you gain some speed it smooths out a little, help!!!!!

    1997 Chevrolet C/K 1500 Cheyenne Extended Cab SB 4WD

    -

    Maintenance & Repair

  • engine running rough after warm up 4 answers

    My truck runs strong when I first start it and as soon as it warms up it begins to cut out n just runs rough in general I put new pluggs and wires in it

    1988 Chevrolet Blazer Silverado 4WD

    -

    Maintenance & Repair

C/K 1500

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

CarGurus has 1,072 nationwide C/K 1500 listings starting at $1,250.

ZIP:

Search Chevrolet C/K 1500 Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Chevrolet C/K 1500 Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 2,960
#2 John Saffrahn
John Saffrahn
Reputation 2,390
#3 Rowefast
Rowefast
Reputation 1,390
View All

Related Models For Sale

Used GMC Sierra 1500
1,001 Great Deals out of 60,141 listings starting at $1,299
Used Ford F-150
3,079 Great Deals out of 208,275 listings starting at $1,200
Used Chevrolet C/K 2500
260 listings starting at $2,995
Used Chevrolet C/K 3500
5 Great Deals out of 281 listings starting at $2,995
Used Chevrolet S-10
11 Great Deals out of 1,630 listings starting at $1,399
Used Chevrolet Camaro
444 Great Deals out of 40,684 listings starting at $3,500

Used Cars For Sale

1998 Chevrolet C/K 1500 For Sale
195 listings starting at $3,900
1997 Chevrolet C/K 1500 For Sale
182 listings starting at $2,950
1996 Chevrolet C/K 1500 For Sale
111 listings starting at $3,995