In park or idle it sometimes revs and then idles low on 1999 Nissan Altima

Sometimes in Park or idling at a stoplight my car revs up and then down without my touching the gas, what's going on?

by in Shelby, NC on August 10, 2009
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2 answers 2 comments
ANSWER by , 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?
COMMENT by , February 06, 2011
Yes
COMMENT by , 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
ANSWER by , March 28, 2011
Get the diagnostic codes in the engine computer checked and diagnosed.