My 2005 rendezvous has begun to idle in excess of 2500 rpm s, whether in park or neutral. if you leave the motor running at this idle rate, the temp. gauge will go to the 3/4 mark for a little bit and then drop back to normal. In drive, you can reach 50mph without touching the accellerator. No dash lights ever come on and a diagnostic test revealed nothing wrong. If you turn the motor off and restart, it may be fine for a few minutes, then begin to idle fast again. Thank you
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2005 Buick Rendezvous Question: Fast idle on my Rendezvous
Answer #1mastertech6371 May 30, 2010, 20:09Master
idle air control motor may be bad or gross vaccuum leak. take it to a shop for them to verify.
ReplyVisitor, May 31, 2010, 10:04Rookie
Thanks, Roy. I have had it to my local guy twice...when you say gross vacuum leak, would that be the intake manifold gasket?
Replynewdaddy2013, October 27, 2013, 15:08Rookie
hi if you figure out what this problem is please do share my 04 is doing the same thing i have changed many parts pcv valve and the line for it cleaned mass air flow sens and idle air control sens is new nothing i change seems to help it but yes in park and n it goes up to about 2500 r 3k and you can reach about 55 without gas peddle being touched