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Old 12-07-2012, 08:34 PM
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Do you have the vacum advance hooked up and does it have a lock out installed so it only deliver total of 11 degrees or so. Also mechanical locked out as well.

If nto this could be an issue if its knocking sometimes detonation just sounds like the engine shaking badly and bouncing off a wall. Stumbles and back fires can be caused by massive detonation like having the stock dizzy in a performance engine.
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