This can often indicate the introduction of excess air into the engine through a crack in the bellows at the turn to the idle air control motor, it is a typical failure. If so, replace the bellows and clear the fault. The part is available online at Realoem. Com #13-54-1-437-191 and cost $12.16 plus whatever shipping charges.
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Wednesday, November 19th, 2008 AT 12:14 PM