I have a rough idle and a miss and did a full plug wore cap and rotor replacement and still runs rough. I have good fuel pressure and spark. not sure what else to look at? starts up rough but quickly, so I thought Iwould rule out the fuel pressure regulator. Any ideas out there?

Asked by Sep 13, 2015 at 07:31 PM about the 1999 GMC Yukon SLE 4WD

Question type: Maintenance & Repair

5.7 litre gmc motor

5 Answers

27,135

not enough info ..did it do it .. miss..before your work?

May need new plug wires?

I replaced plugs, wires, cap and rotor. Yes it did it before I did it. Figured itmayhave been the cap since it was very very corroded.

1,435

could be a vacuum leak or injector. if you can get to your injectors while it is running unplug one then plug it back in one at a time see if any change with any of them. also i think chevy had a problem with the back of the intake leaking you might check for that

15

I had a 92 Chevy k1500 5.7 that had a rough idle and slight miss..... if it has a distributor and not individual coil packs there is a wire from the distributor to firewall... disconnect the wire and turn the ignition key to the one position and even try to start if need be.... but if you disconnect the wire it somehow resets the memory to the ignition firing... may even be able to disconnect the battery with the distributor to firewall wire disconnect.... let set for a few minutes and reconnect everything and it should take care of the problem.... if not it could possibly be the distributor itself or a faulty ignition coil

Your Answer

Yukon

Looking for a Used Yukon in your area?

CarGurus has 21,587 nationwide Yukon listings starting at $1,495.

ZIP:

GMC Yukon Experts

  • #1
    clayduster71
    Reputation
    2,710
  • #2
    David Boccabello
    Reputation
    870
  • #3
    Drpsychmom
    Reputation
    690
View All

Related Models For Sale

Used Chevrolet Tahoe
650 Great Deals out of 39,640 listings starting at $1,000
Used Cadillac Escalade
216 Great Deals out of 11,251 listings starting at $2,000
Used GMC Yukon XL
244 Great Deals out of 13,723 listings starting at $1,495
Used Chevrolet Suburban
356 Great Deals out of 21,930 listings starting at $1,999
Used GMC Sierra 1500
890 Great Deals out of 65,682 listings starting at $1,995
Used Ford Expedition
388 Great Deals out of 19,473 listings starting at $1,295
Used Chevrolet Silverado 1500
2,135 Great Deals out of 167,426 listings starting at $1,900
Used Ford F-150
2,324 Great Deals out of 184,536 listings starting at $699
Used Jeep Grand Cherokee
914 Great Deals out of 70,986 listings starting at $950
Used Ford Explorer
857 Great Deals out of 63,883 listings starting at $1,000
Used Dodge Durango
303 Great Deals out of 21,543 listings starting at $2,195
Used Toyota 4Runner
293 Great Deals out of 22,096 listings starting at $1,750

Used Cars For Sale

2018 GMC Yukon SLE 4WD For Sale
233 listings starting at $48,704
2017 GMC Yukon SLE 4WD For Sale
706 listings starting at $40,977
2016 GMC Yukon SLE 4WD For Sale
34 listings starting at $33,875
2015 GMC Yukon SLE 4WD For Sale
7 Great Deals out of 197 listings starting at $31,250
2014 GMC Yukon SLE 4WD For Sale
8 listings starting at $25,000

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.