99' chevy 5.7L suburban Vortex engine misfires at high speed when engine revs up over 3000 RPM

Asked by Jan 28, 2017 at 04:24 PM about the 1999 Chevrolet C/K 1500 LS 4WD

Question type: Maintenance & Repair

a new spider, distributer, coil and fuel pump have been installed along with all
ignition wires and plugs

5 Answers

checked all those. It really appears electrical since the misfirre is very rapid and constant. if I let off on the gas pedal the engine resets and then all works great again.

100,395

Had a Tahoe that would do the same thing found out is was an intake gasket leak, causing a lean reading on number 3 and 5 cylinders, but could only feel a single misfire. Replaced the gaskets and no more problem, but tranny man is right about having it live data scanned, so the fuel trims can be seen in real time and if anything else is out whack.

I actually had the intake gasket replaced too!

100,395

Then go for a live data scan.

73,775

May want to check the engine compression.

Your Answer

C/K 1500

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

CarGurus has 11 nationwide C/K 1500 listings starting at $5,999.

Postal Code:

Chevrolet C/K 1500 Experts

  • #1
    Andrew Olsen
    Reputation
    3,600
  • #2
    John Saffrahn
    Reputation
    2,570
  • #3
    Rowefast
    Reputation
    2,170
View All

Related Models For Sale

Used Chevrolet Silverado 1500
178 Great Deals out of 11,110 listings starting at $999
Used GMC Sierra 1500
266 Great Deals out of 10,821 listings starting at $2,995
Used Ford F-150
472 Great Deals out of 10,109 listings starting at $3,450
Used Dodge Ram 1500
47 Great Deals out of 536 listings starting at $1,300
Used Chevrolet Tahoe
4 Great Deals out of 721 listings starting at $4,995
Used Toyota Tacoma
40 Great Deals out of 879 listings starting at $5,990
Used Chevrolet S-10
8 listings starting at $5,495
Used Chevrolet Camaro
3 Great Deals out of 814 listings starting at $12,995

Used Cars For Sale

1998 Chevrolet C/K 1500 For Sale
2 listings starting at $5,999

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.