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It sounds like there may be some carbon in the combustion chambers causing pre-ignition and run on after shutdown. Purchase a container of engine combustion chamber cleaner with Techron in it. Follow the directions. You add it to your fuel tank. It cleans the fuel system and combustion chambers of deposits. By reducing deposits you reduce the chance of engine run on after ignition shutdown. Also you can try a tank of premium fuel. If the engine stops properly that's another indication of deposits.

ANSWER--- Check the timing

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โˆ™ 2010-01-05 07:24:43
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Q: Why does your Car stutters when shutting off?
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