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Originally Posted by c1apton
Do you mean it's "dieseling"? (like running on) If that's the case after you put in 91 octane could be a carbon build up causing pre-ignition. When was last plug change? Does it do it everytime you turn it off or only after certain circumstances? (more info please)
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yes dieseling if thats what u call it.
Changed plugs about 15-20k ago. New wires also. Bosch all around.
Usually only does it when its hot, when i take a drive longer then an hour or when i drive spritedly.