My mechanic power washed the engine compartment and now I have a high idle problem. So I took it back done, but he could find any hoses that were knocked off or loose. He also tried tapping on the idle control valve, but that didn't seem to effect it.
His last effort was to check the OVP, but the fuses were fine.

Does anyone have any suggestion as to what else I might try to bring the idle speed down?

Thanks