2000 Honda Odyssey engine revs

Hi onlyrealtor,

This is commonly termed as surging and it is due to excessive air getting into the manifold resulting in inicrease in idling rpm. The Power Control Module would try to compensate thus the surging.

1. Check for bad PCV vlaves, vacumn leakages.
2. Check the idlie speed adjustment.
3. Check Ide Air Control valve.