Car revs up and down on start up?
I have a 92 Honda accord. On start up (only when not driven for 4+ hours) it starts revving up and back down for a good 5 minutes until it settles at a normal idling place. It revs up to around 2300 rpm's then settles down to around 1500 rpm's and back up again. It continues this, with the revs getting shorter and shorter, until it stops. Would this have to do with the throttle control sensor?
THE IDLE AIR CONTROL VALVE MAY HAVE A VACUUM LEAK BUT OTHER DEVICES CAN ALSO.
I'd check out this site: http://honda-tech.com/showthread.php?t=1457225
A lot of good advice.
Yes.
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