Offshoreonly.com - 496ho won't rev past 4600rpms

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Psecrest

05-30-2022 06:04 AM

496ho won't rev past 4600rpms

Hey guys. Got a 2003 fountain 27 fever 496ho. Can't seem to get boat past 4600rpms. Runs great below that. There is 2 red lights on dash that come on at those rpms. I scanned it and found a iac code. I have a new iac valve that is going in today. From what I have read the iac really only controls idle. It is idles perfect. Is it possible that code will limit engine rpms?. Is there something else I'm missing. Boat was just purchased and don't know any history

Ryan00TJ

05-30-2022 06:46 AM

https://www.offshoreonly.com/forums/...tput-code.html

My IAC experience.

underpsi68

05-30-2022 08:27 AM

Yes IAC can put engine in guardian mode and limit rpm.

PA.WOODCHUCK

05-30-2022 08:31 AM

Quote:

Originally Posted by underpsi68 (Post 4833887)

Yes IAC can put engine in guardian mode and limit rpm.

Shouldn't that show up in scan history?

Ryan00TJ

05-30-2022 08:49 AM

Quote:

Originally Posted by PA.WOODCHUCK (Post 4833888)

Shouldn't that show up in scan history?

Yes. You will see a Guardian and overspeed fault. Scanning thru freeze frame data you can see engine data when these faults occured.

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