2004 challenger 2000 240 efi wont rev over 3000 rpm

[xlonewolf1967]

have a friend who has a 2004 challenger 2000 240 efi that wont rev over 3000 rpm and push it past that it stalls out.
all fuel filters have been changed, VST cleaned and checked, fuel pressure has been checked, swapped out the computer, new TPS.
these are all things that 3 other marine mechanics have tried with no positive results. I'm thinking on the lines of possible bad crank trigger.
thoughts ???

boating season is upon us here in mass and its getting busy

 

[UKGlenn]

Possibly not your fault but I had a broken alternator belt so no charging. Presented same conditions. Are you getting any beeping alarms?

 

[Cablebandit]

Does this boat have "the guardian" on it?

 

[gioakjoe]

if you have checked compression and air and fuel and oil are getting to the engine and no warning beeps try the electrical the emergency lanyard on my new rebuilt engine was killing by boat last year it would idle but if i try to rev up it would kill it turns out vibrations where shorting out the emergency lanyard and when I disconnected it I never had the problem again so after a while i just got a new lanyard switch My mechanic was scratching his head but dr Honda knew that the emergency lanyard switches are known to go bad. worth a try just unplug the harness

 

[xlonewolf1967]

that was the first thing I looked for cablebandit and it does not. some came with it and some didn't.
gioakjoe I tried that too no luck

 

[joha0036]

Does this boat have "the guardian" on it?

What is "the guardian"?

 

[gioakjoe]

What is "the guardian"?

computer will put the boat in limp mode if it thinks something is wrong in this mode u cant go much faster then idle

 

[Scottcba1]

How do you knw if your boat has the guardian? And if so how do you disconnect it?