High idle after used a few minutes.

[TONOFUN]

2004 super air Nautique. After the boat is used for a few minutes the idle begins to race anywhere from 2100RPM to 3200RPM. Have tried to clean the inside of the throttle body and throttle shaft. I lubed all the linkage and pivots. Lubed the inner throttle cable. Added a extra throttle return spring. None of these maintenance items ended up helping. I have found out that turning off the engine and restarting it clears it up immediately, but it happens again. My assumption is a issue with the TPS sensor or some other computer related issue.
I would appreciate any thoughts or fixes anyone has experienced with a positive outcome with this issue.

[XBIGPUN66]

Could be a choke issue

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[Peter6000]

2004 super air Nautique. After the boat is used for a few minutes the idle begins to race anywhere from 2100RPM to 3200RPM. Have tried to clean the inside of the throttle body and throttle shaft. I lubed all the linkage and pivots. Lubed the inner throttle cable. Added a extra throttle return spring. None of these maintenance items ended up helping. I have found out that turning off the engine and restarting it clears it up immediately, but it happens again. My assumption is a issue with the TPS sensor or some other computer related issue.
I would appreciate any thoughts or fixes anyone has experienced with a positive outcome with this issue.

Check for vaccum leaks, if fuel injected check idle air control valve. Disconnect it when idle high if idle drops is most likely not bad.

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[gary s]

Chokes went out with carburetors. I'm not familiar with Chevy's but it has to have a IAC valve,unless it's drive by wire,that is what controls the idle speed via the ECM. I'd google 2004 Chevy IAC valve and go from there,it could be dirty and sticking.