strange Idle behavior

[Gilead1]

Hello,
Liberty KK 2011,
Gear in P or N, I hit the throttle to 3000+ RPM and release but the engine stays at high RPM (sometimes even getting higher by 100-200 RPM) for 2-3 second and then decelerates very slow to Idle.
any idea what may be the problem?

 

[02blue]

That may not be unusual. I think my 2011 Avenger did the same thing with no load. Could be a computer setting since those are drive by wire. Maybe TPS is acting up. Only other thing would be to check to see if the throttle body is clean. I'd be concerned if it went WAY high after but a 100 or so RPM more isn't probably gonna hurt anything.

 

[Michael Noland]

Make sure your floor mat isn't hitting the gas for you.