07-23-2010, 09:07 AM
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CC Member
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Join Date: Aug 2009
Location: Edinburg,
TX
Cobra Make, Engine: Everett Morrison, All aluminum small block ford.
Posts: 436
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Not Ranked
Its generaly spark or fuel related. Have you checked the valve lash? Might want to pull the valve covers and just give them a once over to eliminate that possibility.
If the lash was too tight then that might cause a valve to hang open a little and give you grief with reflux at the lower rpms. If it was to loose then it can retard the valve timing and give you a backfire through the exhaust...Im just thinking out loud really. Just something to look at.
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