Miss fire cyl 6

Asked by Deluxe_1848 Feb 25, 2017 at 09:02 PM about the 1998 Pontiac Grand Prix 4 Dr GTP Supercharged Sedan

Question type: Maintenance & Repair

So I bought this car it seemed fine I took off the
exhaust being the resonator and since then I've
noticed it missfiring on cyl 6 I've replaced the spark
plug and have ran injector cleaner through the gas
tank what could be causing this issue?

1 Answer

220,515

Resonator, is that the catalytic converter? One would need to be on there for the engine to run right...P0306 PONTIAC - Cylinder 6 Misfire Detected...Possible causes; Faulty spark plug 6, Clogged or faulty fuel injector 6, Faulty ignition coil 6, Fuel injector 6 harness is open or shorted, Fuel injector 6 circuit poor electrical connection, Ignition coil 6 harness is open or shorted, Ignition coil 6 circuit poor electrical connection, Insufficient cylinder 6 compression, Incorrect fuel pressure, Intake air leak...The P0306 code means that the cylinder 6 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 6. If the problem persist more tests needs to be done to diagnose problem.

3 people found this helpful.

Your Answer:

CarGurus Experts

  • #1
    munron
    Reputation
    8,110
  • #2
    james sparrow
    Reputation
    7,480
  • #3
    Dorian Hendricks
    Reputation
    6,000
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Pontiac Firebird
18 listings
Used Chevrolet Monte Carlo
5 listings starting at $9,800
Used Honda Accord
53 Great Deals out of 1,019 listings starting at $2,995
Used Chevrolet Silverado 1500
213 Great Deals out of 9,034 listings starting at $2,900
Used Ford F-150
343 Great Deals out of 12,723 listings starting at $599
Used Buick Regal
7 Great Deals out of 28 listings starting at $6,995
Used Chevrolet Malibu
48 Great Deals out of 1,130 listings starting at $2,995
Used Ford Mustang
54 Great Deals out of 1,606 listings starting at $6,200

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.