P0306 code on an 01 grand prix gtp what would cause this. I have already replaced plugs and coil packs to no avail. Any ideas?

15

Asked by Apr 25, 2015 at 06:46 PM about the 2001 Pontiac Grand Prix GTP

Question type: Maintenance & Repair

5 Answers

66,145

Have you replaced the spark plug wires? If not, replace them. Plugs and wires should be replaced together. If that doesn't solve the problem check for a bad fuel injector on cylinder #6 (P0306 is a misfire on cylinder #6). If that's ok compression test that cylinder. HTH. -Jim

Best Answer
15

Plug wires just replaced and new injector on #6 and has good compression

66,145

Wait until after dark (no joke) and start the engine. Open the hood and look for sparking at the #6 plug wire. If you see any, the plug wire is either defective or not fully seated on the spark plug. This will cause a misfire. If you can't see any sparking get a spray bottle of plain water and mist (don't saturate) all around the engine, while it's running. Be sure to mist the plug wires and coil pack areas. Again look for the sparking at #6. HTH. -Jim

15

Did that and no sparking

66,145

Check to see that you have spark at that individual cylinder. Also, using a noid light, see if you have a trigger signal to the injector. HTH. -Jim

Your Answer

Add photo

Related Questions

  • 2004 Pontiac Grand Prix Ask me any questions 39 answers

    I have totally replaced and rebuilt this car. I have experienced some major obstacles and solved them. I have experience with this year model Grand Prix. I may be of some help to others.

    2004 Pontiac Grand Prix GTP

    -

    Maintenance & Repair

  • 97 grand prix gtp wont start 4 answers

    I have a 97 gtp that instantly died on the highway going 70 mph. The steering went tight along with the breaks being harder to press down. It had a half a tank of gas. Car has 175k miles. Ive check...

    1997 Pontiac Grand Prix 4 Dr GTP Supercharged Sedan

    -

    Maintenance & Repair

  • Why does it stall after it is warmed up? 12 answers

    I have a 2000 Grand Prix GTP that stalls after it warms up with no error codes. Has this happened to anybody else?

    2000 Pontiac Grand Prix GTP

    -

    Maintenance & Repair

  • Abs, TCS and 2 codes 5 answers

    I have a 2003 grand prix gtp. I am having a problem with the abs, TCS and the check engine light flashing. The engine light is for no.4 cylinder misfire and no.4 injector. Now all this happens at ...

    2003 Pontiac Grand Prix GTP

    -

    Maintenance & Repair

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,871 nationwide Grand Prix listings starting at $900.

ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 4,160
#2 Tom Demyan
Tom Demyan
Reputation 2,830
#3 munron
munron
Reputation 2,180
View All

Related Models For Sale

Used Chevrolet Impala
521 Great Deals out of 31,725 listings starting at $1,450
Used Pontiac Bonneville
3 Great Deals out of 533 listings starting at $1,799
Used Pontiac Grand Am
1,215 listings starting at $1,999
Used Chevrolet Monte Carlo
21 Great Deals out of 1,408 listings starting at $1,995
Used Ford Mustang
472 Great Deals out of 45,735 listings starting at $1,999
Used Chevrolet Malibu
950 Great Deals out of 79,654 listings starting at $1,500
Used Chevrolet Camaro
225 Great Deals out of 30,943 listings starting at $1,217
Used Ford Taurus
249 Great Deals out of 20,433 listings starting at $699
Used Honda Accord
813 Great Deals out of 84,287 listings starting at $1,050

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.