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What is the po300 code mean

(2002 Pontiac Grand Prix GTP)
in Coffey, MO on February 26, 2012
What is said on the machine was it was a random misfire
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Popular Answer
on February 26, 2012
Random misfire is when different cylinders misfire at different times.
Some times you can feel it misfire and sometimes you can't.

Most of the times a tune up will solve the problem.
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