Chevy misfire

Asked by Guru11NYV Jan 12, 2020 at 02:33 AM about the 1998 Chevrolet C/K 2500 Silverado Extended Cab RWD

Question type: Maintenance & Repair

My 1998 Chevy Silverado has a vortec 5.7L
(350) and is misfiring in cylinders 5 and 7, no
codes are thrown on the dash but havnt got to
run a OBD 2 scan on it yet. At idle you can
hear the misfire but while going down the road
the truck starts to backfire randomly, it gets
worse when the engine gets under load (going
up a hill or starting in 2nd gear instead of 1st) I
have major lose of power now and struggle to
make it above 60 mph. Gas is also going
quicker then ever, use to be able to make 250
miles per tank now I can only make 120 miles
per tank. I have replaced all spark plugs,
spark plug wires, rotor and cap, and ignition
coil. The misfire  started happning randomly
one night while I was sitting at a stop light and
have run out of ideas and what els to check.

1 Answer

Your Answer:

Related Questions

  • Chevy misfire 1 Answer

    My 1998 Chevy Silverado has a vortec 5.7L (350) and is misfiring in cylinders 5 and 7, no codes are thrown on the dash but havnt got to run a OBD 2 scan on it yet. At idle you can hear the misfire...

    1998 Chevrolet C/K 2500 Silverado Extended Cab RWD

    -

    Maintenance & Repair

  • Chevy 4x4 problem 2 Answers

    I have a 94 chevy 4x4 with a manual trans. It will not engage into 4x4 .When you put it in 4x4 the front drive shaft is locked in. So I checked the fuse in the fuse box it was fine.Then I changed the ...

    1994 Chevrolet C/K 2500 Silverado Extended Cab RWD

    -

    Maintenance & Repair

  • will a 73 chevy 5.7l 400 engine bolt up to a 89 chevy 350 hydromatic trans 1 Answer

    im taking a 73 chevy 5.7l 400 engine from a 4 x 4 and putting it in a 89 Chevy pickup (350eng) 2 wheel drive. will it match and bolt up with everything?

    1989 Chevrolet C/K 2500

    -

    Maintenance & Repair

  • 98 chevy 2500 Silverado door and window compatability 2 Answers

    Need to know what chevy models and years the doors/windows are compatible with my 98 chevy 2500. Need a passenger window asap in Kansas City missouri Tahoe Suburban??

    1998 Chevrolet C/K 2500 Silverado LB RWD

    -

    Maintenance & Repair

  • 2500 Chevy 5.0 2wd 2 Answers

    Hey I have a Chevy truck I've been working on It's had a oil change and new starter put in plus radiator and alternator in it and now whenever I connect. My battery terminals my truck starts or t...

    1999 Chevrolet C/K 2500 Crew Cab HD RWD

    -

    Maintenance & Repair

Shortcuts

Search Chevrolet C/K 2500 Questions

CarGurus Experts

  • #1
    Rowefast
    Reputation
    680
  • #2
    Paul
    Reputation
    310
  • #3
    Gene Arnett
    Reputation
    280
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Silverado 2500HD
29 Great Deals out of 1,243 listings starting at $9,990
Used Chevrolet Silverado 1500
206 Great Deals out of 5,840 listings starting at $2,975
Used Chevrolet C/K 1500
6 listings
Used Chevrolet Silverado 2500
2 listings
Used GMC Sierra 2500
2 listings
Used Ford F-250 Super Duty
23 Great Deals out of 1,179 listings starting at $8,995

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. Content will be removed if CarGurus becomes aware that it violates our policies.