Runs rough after warm up.

Asked by Jun 10, 2017 at 08:57 AM about the GMC Sierra 1500

Question type: Maintenance & Repair

1986 GMC Sierra, 305, auto trans, carburated.  Have read all the issues other
have posted, and it acts similar to the diaphragm issue, but not injected.  
Changed fuel pump, installed inline filter, new gas, all the usual tuneup items,
still no joy.  Could it be something in the coil?

No answers yet

Your Answer

Add photo

Related Questions

  • Runs rough after warm up.

    1986 GMC Sierra, 305, auto trans, carburated. Have read all the issues other have posted, and it acts similar to the diaphragm issue, but not injected. Changed fuel pump, installed inline filter, ...

    GMC Sierra 1500

    -

    Maintenance & Repair

  • Why does it rough idling on startup? 2 answers

    Weather its cold or warm on startup it idles rough then rpm goes up to 1500 and smoothes out and runs great, idles good after that.

    1995 GMC Sierra 1500 C1500 SLE Extended Cab Stepside SB

    -

    Maintenance & Repair

  • truck wont warm up 14 answers

    My 1994 v6 gmc 1500 4x4 will not warm up the gauge barley gets over 100 an it blows cold air i replaced both coolant sensors an put a new thermostat in an i even took the fan off to see if it woul...

    1994 GMC Sierra 1500

    -

    Maintenance & Repair

  • 94 gmc pick up engine 5.0 when the engine warm change drive to rivers stall 1 answer

    94 g m c 1500 engine 5.0 when the engine warm been drove for about 25 30 minutes stop and try to rivers engine run rough or stall turn the steering engine stall any idea?

    1994 GMC Sierra 1500 K1500 SL 4WD Extended Cab LB

    -

    Maintenance & Repair

  • rough idling 3 answers

    why does my 98 Sierra idle rough between 1st and 2nd gear,? it's 2wd runs good once it gets out of 2nd,gears switch right on with the rpms at 2,500. what could our be.?

    1998 GMC Sierra 1500 C1500 SL Extended Cab SB

    -

    Maintenance & Repair

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 5,270
#2 John Saffrahn
John Saffrahn
Reputation 3,640
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 3,330
View All

Related Models For Sale

Used Chevrolet Silverado 1500
136 Great Deals out of 9,300 listings starting at $100
Used Ford F-150
375 Great Deals out of 9,645 listings starting at $995
Used GMC Sierra 2500HD
21 Great Deals out of 902 listings starting at $6,500
Used Toyota Tundra
16 Great Deals out of 729 listings starting at $2,000
Used Dodge Ram 1500
56 Great Deals out of 534 listings starting at $2,499
Used Ram 1500
346 Great Deals out of 23,852 listings starting at $845
Used Toyota Tacoma
19 Great Deals out of 776 listings starting at $6,999
Used GMC Yukon
15 Great Deals out of 752 listings starting at $6,950
Used Chevrolet Silverado 2500HD
6 Great Deals out of 823 listings starting at $6,495
Used Chevrolet Tahoe
3 Great Deals out of 561 listings starting at $4,995
Used Ford F-250 Super Duty
17 Great Deals out of 854 listings starting at $2,450
Used GMC Canyon
15 Great Deals out of 1,272 listings starting at $1,995
Used Chevrolet Camaro
764 listings starting at $2,500
Used Chevrolet Colorado
13 Great Deals out of 1,322 listings starting at $1,700
Used Nissan Titan
12 Great Deals out of 679 listings starting at $5,450

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.