2012 sundancer 310 power loss at 2k rpm

[Zim]

Hi all,
Wondering if anyone can provide some diagnosis.
2012 searay with 5.0 bravo 3s. Engine id 1A653471. Port engine won't rev past 2k rpm under load. Starts fine, idles fine, all is well, but under load, max rpm is 2k max and alarm sounds, stating power loss. Once i shift into neutral alarm goes away with no codes. Doesn't stall or back fire. In neutral, throttle only, no issues in hitting rev limiter. I checked the obvious fuel pressure, approx 38-39 psi, filter is clean, no contamination to include the mesh filter on bottom of filter housing. I don't believe it's a fuel issue, maybe a sensor, injectors?
Ordered the scan tool to help possibly pin point as i don't get any codes or beeps.
Thoughts?

 

[Zim]

Was going to check pressure regulator vacuum, but haven’t been able to today.

 

[Ghaith mubarak]

Hi,
I had the same issue and after spending hours of diagnosis it turned on that the fuel tank paint is mixed with the fuel and the engine won’t go more then 2000rpm as a safety thing , clean up the fuel tank .