Idle Surge on 2003 Honda Odyssey

My engine surges at idle to about 1100 rpm. It does not always do it. My mechanic has checked everything out and can find no problems. He confirmed that the O2 sensors are good and that the IAC valve is good. There are no fault codes set. It does not matter if the engine is hot or cold when it happens. Any thoughts?

by in Diamond Bar, CA on May 03, 2010
2 answers
ANSWER by on May 06, 2011
Idle goes up and down around 1100 RPM?
ANSWER by on May 10, 2011
Problem solved. It was the power steering pressure switch. It had a faulty electrical connection.
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A faulty Idle Air Control valve (IAC) can cause the engine to surge and the Check Engine light (MIL) to come on. Replacing the IAC valve will repair this issue.
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