1999 Honda Odyssey Engine revving

Tiny
BISHOP LIAM
  • MEMBER
  • 1999 HONDA ODYSSEY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 170,000 MILES
My engine has started revving and will not go all the way down when idling. It does this at stop points and when the engine is in neutral.
Sunday, March 1st, 2009 AT 6:27 PM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi Bishop Liam,

The idling speed is out of specs and possible causes are :

1. Faulty Idle Air Control ( IAC) valve. Is the Check Engine Light showing when driving?

2. Vacumn leakages. Check for dislodged vacumn hoses, faulty PCV and leaking brake power booster hoses.

3. Insufficient coolant in radiator.

4. Idle Adjust screw out of adjustment.
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Tuesday, March 3rd, 2009 AT 11:02 AM

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