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rpm gauge

Old Jun 16, 2007 | 05:46 AM
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usermst9673
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Joined: May 2007
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Default rpm gauge

my rpm gauge goes up to almost 4k rpm when i start the car i know the motor isnt idling at 4k rpm though. Sometimes the gauge works fine and sometimes it doesnt. Its on a 91lx 4cylinder. Any ideas of what to check?
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