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PaulG21

Indmar Monsoon 335 idle surging when warm?

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PaulG21

Hey guys, 

 

Fairly new Malibu owner and couldn't be more excited! But noticed something odd the past couple times I have taken it out. When the engine is cold it runs and idles perfect...when it is warmed up it will surge the rpms in idle...then eventually stall. I know there are countless threads about this but I feel inclined to post and maybe get some more ideas. I have replaced the IAC, TPS, cleaned out entire throttle body. Any ideas what it could be? 

Boat is a 2003 wakesetter with 335 indmar monsoon. 

Other than the idle surging it runs perfectly, 

 

I have also been told to run my blower constantly when the boat is on, something I never did with my old bayliner and have yet to do with the malibu. 

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MadMan

Just a guess, maybe a vacuum leak.

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PaulG21
23 minutes ago, MadMan said:

Just a guess, maybe a vacuum leak.

Going to give that a shot, I do hear almost like a hissing/air loss right after i kill the engine

 

 

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electricjohn

There is a computer reflash available to fix that.  It was inherent to '03's.

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