P0300

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Squirrelsmith

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Wish me luck. Came one several months ago and back today. Both times it happened at 70 mph, possible clue?
 
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Squirrelsmith

Squirrelsmith

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Just replaced it with a msd same with the wires and I got new correct spark plugs. although i will say this never happened before i did that "tune up"
 
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Squirrelsmith

Squirrelsmith

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I cleared the code an it has ran fine since. Seem like it only happens under heavy load.
 

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