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does it seem like the engine is actually idling at 400 rpm?
what is the reading an external tach gives you?
factory tachs aren't usually very accurate, btw.
bill
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'67 CUTLASS 4-DR. W/425 & S.P. THM400 (NAMED "ERNIE")
'83 H/O #1339(STILL IN PIECES)
'85 PONTIAC FIERO SE V-6 4-SPD. BOUGHT NEW
'92 CHEBBY DIS-ASTRO (GAS PIG)
'97 GYRO METRO $HYTBOX  (41.42 MPG) 
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