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Old 08-29-2009, 05:40 PM   #1
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454 cam change
1997 7.4 liter mpi has had a performance cam installed, the rpm fluctuates by about 50 rpm, is this normal??

The new cam is a crane 168731
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Old 09-01-2009, 03:24 PM   #2
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Location: Fredericksburg, Va
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checkmate 251 convincor,checkmate 253 convincor, 50 gibson
did you re-program the ecm ?
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