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Old 07-19-2004, 05:11 PM   #1
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Default RPM Fluxuation when gas capped is removed.

When I was getting gas this morning...I let me car idle ( it was still cold )...no biggie...but when I removed the Gas Cap do put gas in there..the car went from 600rpm'* to 1500 rpm'*..and went back and forth...like someone was hitting the gas pedla ever so slightly. Anyone else have this issue..?

maybe vacuum ?
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Old 07-20-2004, 03:56 AM   #2
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Removing the gas cap with engine running is abnormal procedure. If by chance the EVAP system was running a purge cycle (purge valve open) while you removed the gas cap, then this could maybe explain the fluctuating rpm.
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Old 07-20-2004, 09:21 AM   #3
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and get you a Service Engine Soon condition....

Get an OBDII book; anyone who owns a 96+ car should read a dummy'* guide to OBDII.
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