po codes po301 to 308 and 316 - Ford Mustang Forum
 
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post #1 of 3 (permalink) Old 04-17-2011 Thread Starter
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po codes po301 to 308 and 316

po301 to po308 and 316 can all 8 colles be bad,at the same time,or is it because the batt, was off,when i was upgrading.and car is miss fireing every 3 to 8 sec.

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post #2 of 3 (permalink) Old 04-17-2011
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You did not say what you were upgrading. P0316 is set when the PCM detects a misfire in the 1st 1000 revolutions upon cold starting the engine. P0301-P0308 are cyl 1-8 misfires codes. It's highly unlikely (although not impossible) that you have 8 faulty coils, especially if the engine runs. Usually all of those DTCs are caused by a fuel delivery problem or a gross vacuum leak. This will usually also set a P0300 "random misfire" in addition to the dtcs you currently have. If you provide some more info we can probably help you get it resolved.


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post #3 of 3 (permalink) Old 06-02-2011
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Quote:
Originally Posted by flatratetec View Post
You did not say what you were upgrading. P0316 is set when the PCM detects a misfire in the 1st 1000 revolutions upon cold starting the engine. P0301-P0308 are cyl 1-8 misfires codes. It's highly unlikely (although not impossible) that you have 8 faulty coils, especially if the engine runs. Usually all of those DTCs are caused by a fuel delivery problem or a gross vacuum leak. This will usually also set a P0300 "random misfire" in addition to the dtcs you currently have. If you provide some more info we can probably help you get it resolved.
flatratetecso, i need some help and it seem that you might be able to assist.
i had a stumbling/accelerating problem. went through the forums
first.. here is my upgrades.
msd coils
k&n intake/filter
exhaust/deleted cats

now.. here is what i swapped out after experiencing issues.
cleaned the maf sensor
new icv valve
new egr valve
new tps

earlier today i got these codes P0316 & P0301


i did some searches and came across something about a "harmonic balance" will this affect it?
any assistance will be appreciated thanks..
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