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In park or idle it sometimes revs and then idles low

(1999 Nissan Altima)
in Shelby, NC on August 10, 2009
Sometimes in Park or idling at a stoplight my car revs up and then down without my touching the gas, what's going on?
Displaying 2 answers & 2 comments
Popular Answer
on August 11, 2009
There are several sensors that can cause this, or a vacuum leak, or an issue with the idle controls. Is the check engine light on?
on February 06, 2011
on March 28, 2011
All the time in Park or idling at a stoplight my car revs up and then down without my touching the gas, what's going on? And the check engine light is on

on March 28, 2011
Get the diagnostic codes in the engine computer checked and diagnosed.
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