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This started with the idle jumping from 1000 RPM to 1200 RPM all by itself. Set the TPS to .92v,set idle to 1000 RPM,still did it. Cleaned IAC, still did it. Unplugged IAC set idle to 1000 RPM,still does it but not as often. "Blipping" the throttle makes no difference. Also when it has done this I got out and looked at the throttle to see if it was stuck.Although with IAC unplugged it only does it for a few seconds and then idles down whereas before it could do it for a few seconds or a minute or more. Also there are no codes showing anything and no engine check light. Air leak maybe? Thanks.