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EC300 exhaust note
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04-27-2009, 12:52 PM
gasgasman
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Join Date: Jul 2006
Location: Pearland Texas
Posts: 4,600
If it sounds like an open header, it could be the power valve sticking then abruptly opening.
A friend of mine has an '08 300 that was doing the same thing.
The actuator rod was binding at the power valve actuator pivot.
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