Author Topic: 2002 mxzx 440 7,000 rpm  (Read 3634 times)

Offline hoppytech327

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2002 mxzx 440 7,000 rpm
« on: February 16, 2009, 12:00:01 PM »
the sled runs fine cold when it gets at or near opperating temp when you punch the throttle it runs the way it should for about 50 feet or so then the rpm drops off to 7,000 and stays there even though the throttle is still wide open.if you stop and start again the same thing happens. the sled has the low compression heads on it which i am told should be about 100 psi but still has the factory jets in it that came with the high comp heads.