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06-27-2006, 10:39 AM #1
- Join Date
- May 2006
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- California
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- 17
Chameleon- 1998 Pontiac Trans Am
P0308 Cylinder 8 Misfire Detected HELP!
I just received the error P0308 - Cylinder 8 Misfire Detected the other day during heavy rain. I'm not sure if that had anything to to with it but my car is acting strange and I am not exactly sure what to do. My first thought was to change out the spark plug on cylinder 8 and see what happened, but does anyone have any other ideas? Am I doing the right thing? My plugs are only ~25-28K old and they're bosch platinum +4's. Thanks,
Jeff
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06-27-2006, 10:43 AM #2
- Join Date
- Aug 2003
- Location
- Honolulu HI
- Age
- 41
- Posts
- 2,486
Pewter- all bore 370 Trans Am
plugs, wire maybe loose, coil pack or injector.
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06-27-2006, 11:26 AM #3
- Join Date
- Jul 2005
- Location
- Jacksonville, FL
- Posts
- 2,723
You're on the right track, go for the plug/wire first. Personally not a fan of bosch plugs, or leaving any plugs in for over 25K - JMO.
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06-28-2006, 04:56 AM #4
- Join Date
- May 2006
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- California
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Chameleon- 1998 Pontiac Trans Am
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06-28-2006, 04:59 AM #5
- Join Date
- Aug 2003
- Location
- Honolulu HI
- Age
- 41
- Posts
- 2,486
Pewter- all bore 370 Trans Am
ngk tr55's if your N/A.
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06-28-2006, 07:25 AM #6
- Join Date
- May 2006
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- California
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- 17
Chameleon- 1998 Pontiac Trans Am
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06-28-2006, 07:37 AM #7
- Join Date
- Sep 2005
- Location
- Idaho
- Age
- 40
- Posts
- 16
Red- 2000 Camaro SS
Do the plugs. If that doesnt work, You are fucked. I got that same reading when my engine went to shit. Are your heads making a ticking noise? Loss of power? Engine shanking?
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06-28-2006, 07:53 AM #8
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- Aug 2003
- Location
- Honolulu HI
- Age
- 41
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- 2,486
Pewter- all bore 370 Trans Am
Napa is usually pretty good about carrying them. No, he's not necessarily fucked as you put it. How did you get the code read? Here is what I suggest:
change plugs, if that doesnt work,
swap wire with a known good one. if the miss moves to the new cylinder, its the wire, if not, swap the coil pack with a known good one. If it moves to that cylinder, its the coil pack, if not, swap the injector with a known good one. If it follows..u get the picture. After you change the wire and its not the cause, put it back where it was. same thing for the injector and coil pack. Also, a list of mods and what you were doing with the car would help too. Ive seen misses happen with blown headgaskets too.
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06-28-2006, 09:05 AM #9
- Join Date
- Jul 2005
- Location
- Jacksonville, FL
- Posts
- 2,723
If the parts store says they can't find it ask for NGK stock number 3951. They're MUCH cheaper than the +4's too.
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