2004 Pontiac Grand Am misfiring

Asked by Feb 10, 2017 at 09:35 AM about the 2004 Pontiac Grand Am

Question type: Maintenance & Repair

My car began jerking at a light yesterday pretty
bad.  Replaced all spark plugs and wires. Still
misfiring and difficulty accelerating. CEL is
flashing.  Checked all spark plugs and wires and
they are good. Don't know what else to look at.

4 Answers

73,055

Possible causes; 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.
73,055

May want to run some fuel injection cleaner threw the gas tank also, here is a note from GM fuel injection cleaners...GM UPPER ENGINE AND FUEL INJECTOR CLEANER is the only injector cleaning agent approved for use with General Motors fuel system components. Other injector cleaners may cause damage to plastics, plated metals or bearings. General Motors has completed extensive laboratory testing of GM Upper Engine and Fuel Injector Cleaner, and can assure its compatibility with General Motors fuel system components.

Thank you very much

73,055

Your welcome.

Your Answer

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 1,091 nationwide Grand Am listings starting at $1,599.

ZIP:

Pontiac Grand Am Experts

  • #1
    tenspeed
    Reputation
    7,760
  • #2
    John Saffrahn
    Reputation
    1,610
  • #3
    Tom Demyan
    Reputation
    1,520
View All

Related Models For Sale

Used Pontiac Grand Prix
35 Great Deals out of 2,730 listings starting at $1,200
Used Ford Mustang
759 Great Deals out of 42,755 listings starting at $1,300
Used Chevrolet Impala
590 Great Deals out of 34,659 listings starting at $1,000
Used Pontiac G6
79 Great Deals out of 3,898 listings starting at $1,800
Used Pontiac GTO
10 Great Deals out of 463 listings starting at $5,995
Used Pontiac Bonneville
515 listings starting at $1,799
Used Chevrolet Malibu
1,235 Great Deals out of 78,093 listings starting at $1,500
Used Honda Civic
834 Great Deals out of 78,398 listings starting at $900
Used Chevrolet Monte Carlo
11 Great Deals out of 1,353 listings starting at $995
Used Honda Accord
1,019 Great Deals out of 62,741 listings starting at $999
Used Chevrolet Cavalier
958 listings starting at $1,000

Used Cars For Sale

2005 Pontiac Grand Am For Sale
130 listings starting at $2,000
2004 Pontiac Grand Am For Sale
247 listings starting at $1,599

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.