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Suspected Throttle Position Sensor Issue

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Hi guys,

I own a LSV 23 2008 with the Indmar engine. I was out boating the other week and when I reduced the power the engine would not respond to me. When I came back to idle and out of gear the engine just continued to stay at 4000 + rpm, before I shut it off. Since then I've been unable to start the boat without the engine RPM increasing to over 4000. My initial thought was that one of the cables behind the throttle panel had become jammed or stuck but Ive checked behind there and it all seems in working order. Ive checked the butterfly valve on the air inlet and it is operating as it should. So I then thought maybe it has something to do with the Throttle Position Sensor behind the throttle panel. So I've gone ahead and replaced that sensor as it was only $50. Tried to start the boat today, still no joy. Same issue. Question I have is, do I need to program the TPS? How does the ECM know what idle is when you connect a new TPS? Do I need to use a diagnostic computer to reset it? If anyone has any other ideas that I haven't thought of I would be very grateful.



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Don't know a lot about these but a quick Google search produced a few possibilities & short videos which may hold a clue.

Found this again may point you in the right direction


Post 5 in the link below from Bakes is interesting


Send a PM to the poster of reply 9 in this thread, sounds like it may be the fix if they are still on this forum.


Edited by Andrew63
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