sputtering after complete tuneup

5

Asked by May 10, 2017 at 11:22 AM about the 1993 GMC Sierra 1500 K1500 4WD Extended Cab SB

Question type: Maintenance & Repair

I did a complete tune up on my 93 GMC Sierra K1500 5.7 Liter 350, Plugs,
Wires, Cap Rotor, ICM, coil, Fuel Pump Relay, Etc. Has new Fuel Pump
and Filter 2 years ago and the motor sputters like it has a dead cylinder or
miss fire even under power while driving. Checked all plugs for right gap,
and wires for bad ones and nothing is bad, checked out the TBI all is good
there also, good spray pattern and fuel pressure.  Thinking it may be a
ground issue from motor to frame or something of the sort, frame ground is
rather rusty. Any Ideas please would help alot getting very frustrated and
about to junk the truck.

4 Answers

55,245

Frame ground is rusty? Clean it up and reattach it. Did it run properly before you "tuned it up"?

5

yes truck ran great no real issues with it, was even thinking that the pick up coil on dist. may be going bad

55,245

Is it possible that one or more of the spark plug wires is on the wrong cylinder either at the spark plug end or at the distributor cap?

5

No I checked they firing order 3 times it's all right and good

Your Answer

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 10,505 nationwide Sierra 1500 listings starting at $1,775.

Postal Code:

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
657 Great Deals out of 10,075 listings starting at $2,995
Used Dodge Ram 1500
51 Great Deals out of 494 listings starting at $3,488
Used GMC Yukon
4 Great Deals out of 873 listings starting at $3,800
Used Chevrolet Camaro
929 listings starting at $13,495

Used Cars For Sale

2018 GMC Sierra 1500 For Sale
7,388 listings starting at $29,725
2017 GMC Sierra 1500 For Sale
23 Great Deals out of 1,044 listings starting at $26,938
2016 GMC Sierra 1500 For Sale
29 Great Deals out of 253 listings starting at $22,995
2015 GMC Sierra 1500 For Sale
52 Great Deals out of 571 listings starting at $19,995
2014 GMC Sierra 1500 For Sale
38 Great Deals out of 437 listings starting at $16,613

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.