3 Cylinders not firing on one side but runs

Asked by Guru5RWBV Jan 30, 2018 at 10:46 PM about the 2002 Chevrolet Silverado 1500 Extended Cab 4WD

Question type: Maintenance & Repair

I’ve got a 2002 silverado 1500 4.8 my truck
has been flashing the engine light for
awhile now and I can’t seem too narrow it
down to what it is 3 cylinders not firing at
all on one side I’ve replace spark plugs
wires coil packs and replaced the intake
fuel pressure is 58 psi air filters good as
well as maf compression is also good on
those cylinders

3 Answers
16,485

Guru97FK8 answered 6 years ago

Check the Catalitic Converter on the side of the missfire. If the CAT on that side is blocked it will cause the down stream oxygen sensor to switch between 200 and 800 mV instead of a steady 450 to 500 mV. The Engine's ECU will register this and to prevent the over fueling of the cylinders on that bank of cylinders the ECU will then switch those injectors off. I had this problem with a F150 in Namibia

15 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • 3 Cylinders not firing on one side but runs 3 Answers

    I’ve got a 2002 silverado 1500 4.8 my truck has been flashing the engine light for awhile now and I can’t seem too narrow it down to what it is 3 cylinders not firing at all on one side I’ve repla...

    2002 Chevrolet Silverado 1500 Extended Cab 4WD

    -

    Maintenance & Repair

  • Rear lights on one side not working. 6 Answers

    2003 Silverado Z71. No rear lights on driver's side. Replaced the wiring harness. Still nothing. What else could it be? Passenger side works fine.

    2003 Chevrolet Silverado 1500

    -

    Maintenance & Repair

  • 2000 chevrolet silverado passenger side not firing 5 Answers

    we pulled a 2000 Chevrolet Silverado 5.3 single cab 4wd into the garage today with a misfire thought it was plugs but changed em and didn't fix it the whole passenger side head isn't firing or will fi...

    Chevrolet Silverado 1500

    -

    Maintenance & Repair

  • Only 2,4,6& 8 cylinders are firing 1 Answer

    04 LS 5.3 with crane Cam won't fire the driver side coils after engine swap. Took out the 4.8 and went back with 5.3. help please!!!

    2004 Chevrolet Silverado 1500 LS RWD

    -

    Maintenance & Repair

  • Only 2,4,6& 8 cylinders are firing 1 Answer

    Ok my 5.3 only fires the passenger side coils after swaping 4.8 to 5.3.

    2004 Chevrolet Silverado 1500 LS RWD

    -

    Maintenance & Repair

Silverado 1500

Looking for a Used Silverado 1500 in your area?

CarGurus has 7,896 nationwide Silverado 1500 listings starting at $3,000.

Postal Code:

Shortcuts

Search Chevrolet Silverado 1500 Questions

CarGurus Experts

  • #1
    Rowefast
    Reputation
    10,400
  • #2
    John Carson
    Reputation
    9,570
  • #3
    Andrew Olsen
    Reputation
    9,450
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used GMC Sierra 1500
116 Great Deals out of 8,187 listings starting at $3,000
Used Ford F-150
311 Great Deals out of 13,802 listings starting at $4,500
Used Chevrolet Silverado 2500HD
32 Great Deals out of 1,678 listings starting at $3,000
Used Toyota Tundra
32 Great Deals out of 966 listings starting at $10,698
Used Dodge RAM 1500
90 listings starting at $2,500
Used Toyota Tacoma
43 Great Deals out of 741 listings starting at $9,975
Used Chevrolet Tahoe
12 Great Deals out of 806 listings starting at $9,980
Used GMC Sierra 2500HD
28 Great Deals out of 2,196 listings starting at $3,000
Used Chevrolet Camaro
15 Great Deals out of 467 listings starting at $10,995
Used Ford F-250 Super Duty
29 Great Deals out of 795 listings starting at $2,890
Used Ford Mustang
36 Great Deals out of 1,623 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.