2000 Yamaha 115 4 stroke won’t go to full throttle

[Cplsteve]

Hello I don’t know if this has been addressed yet. I have a 2000 Yamaha f115TLRY starts up idles good and runs perfect at low speeds. When I give it full throttle it falls on its face. If I pull the throttle back slightly it will run at about 3800 rpm. I have replaced the following
all filters and separators
had injectors tested and cleaned
rebuild vst and new pump
low pressure pump
fuel pressure regulator
new plugs
new fuel
primer ball
impeller.
I have also smoke tested the fuel system and found no leaks. With the yds I checked tps and it’s at correct voltage. It’s not showing any faults either. Any help would be greatly appreciated

 

[99yam40]

what is the rail pressure doing when it falls on it's face?
have you used a timing light to see what spark timing is doing when the problem shows up?

what is a smoke test of the fuel system?

 

[Cplsteve]

I have to get a fuel pressure gauge to check the rail pressure. I have not tried a timing light did not know it was needed on fuel injected motors, but I can definitely try it out. A smoke test is a machine that puts an inert smoke/fog into the system to look for leaks. Mainly used in automotive to find evap leaks

 

[99yam40]

testing is better that just throwing parts at the motor to see if that helps.

 

[Cplsteve]

So I checked the timing with the timing light. It is showing 1 notch to the right of TDC mark.

 

[Supervee20]

Is your fuel tank venting properly?