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Old 10-25-2011, 05:03 PM   #5
diesel1962
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Re: Spark Knock,78' Cadillac

Thanks again Max,The EGR valve cannot be pulled up from the bottom.I guess I will remove it from the engine and try cleaning it.It is getting good vacuum to the valve.And I have been doing the timeing adjustments with the engine at operating temp.Will let you know what happens...........Diesel1962
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