- 08 CX-9 GT FWD
Bummer! Sorry to hear. First thing that comes to mind is throttle body. You double check everything? Dirty connector, is the crankcase ventilation tube snapped in securely? You gapped those plugs to the right amount? Intake tube ring tightened at the throttle body? Have you tried removing battery again? I would tend to agree with vacuum leak or throttle body issue. Every rpm issue with my old vw's a long time ago was always throttle body or vacuum line related. Course don't forget when the cx9 is cold it will idle a little high for the first minute or so. Hope it is something simple for you. I have about 18k since plug change without issue knock on wood.