Why is my 2002 4.2 l Chevy trailblazer misfiring after I changed the oil

Asked by Jun 15, 2017 at 02:54 AM about the 2002 Chevrolet TrailBlazer LT 4WD

Question type: Maintenance & Repair

2 Answers

78,975

Have the vehicle scanned for trouble codes to know which cylinder is miss firing. the look at possible causes like, Faulty spark plug (s), Faulty ignition coil (s), Clogged or faulty fuel injector (s), Intake air leak, Fuel injectors harness is open or shorted, Fuel Injectors circuit poor electrical connection, Ignition coils harness is open or shorted, Ignition coils circuit poor electrical connection, Insufficient cylinders compression, Incorrect fuel pressure.

1 of 1 people found this helpful.

It's a coincidence that it started after the oil change. If check engine light is on, go to Autozone for a scan to find bad cylinder. It's almost certainly a plug or coil. If a plug, probably change them all. if no check engine light, take it out and beat on it until the light turns on. Several 0-50 at full throttle usually will set the trouble light.

Your Answer

TrailBlazer

Looking for a Used TrailBlazer in your area?

CarGurus has 33 nationwide TrailBlazer listings starting at $2,995.

Postal Code:

Chevrolet TrailBlazer Experts

  • #1
    bigdogracer
    Reputation
    1,020
  • #2
    Tom Demyan
    Reputation
    930
  • #3
    tennisshoes
    Reputation
    710
View All

Related Models For Sale

Used Chevrolet Tahoe
7 Great Deals out of 986 listings starting at $3,995
Used Jeep Grand Cherokee
139 Great Deals out of 3,880 listings starting at $3,499
Used Chevrolet Silverado 1500
189 Great Deals out of 12,269 listings starting at $734
Used GMC Envoy
34 listings starting at $3,250
Used Chevrolet TrailBlazer EXT
11 listings starting at $5,500
Used Chevrolet Impala
146 Great Deals out of 1,117 listings starting at $1,781
Used Ford Explorer
41 Great Deals out of 1,607 listings starting at $4,995
Used Chevrolet Camaro
958 listings starting at $11,965
Used Dodge Durango
96 Great Deals out of 962 listings starting at $3,499
Used Chevrolet Blazer
18 listings starting at $1,980
Used Ford F-150
601 Great Deals out of 9,508 listings starting at $3,490

Used Cars For Sale

2007 Chevrolet TrailBlazer LT 4WD For Sale
3 listings starting at $6,900
2006 Chevrolet TrailBlazer LT 4WD For Sale
2 listings starting at $5,995

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.