2001 Seadoo GTX DI bogging problem HELP!!!

[aaronm]

Hi, having problems with my recently rebuilt engine, starts good and idles fine, found at low rpms ski jumps and skips a lot takes a lot to get to 4200rpm half throttle, any more throttle ski just bogs down, I have checked spark plugs, cleaned fuel lines, air lines, cleaned fuel and oil tanks, raves cleaned, cleaned air/fuel rail, fuel pump goes, solenoid clicks, conducted fuel pressure test have exhausted all options, one question is the two regulators on fuel rail I cannot blow through not sure if this is ok or not, I am new at this engine type work but not sure where to go from here please help!!!!

 

[smc0922]

I don't think you can blow through the regulators unless your lungs can develop the high pressure that the fuel would be running at. I believe it's around 100 psi. If it passed the fuel pressure test then I wouldn't suspect the regulators, pressure would spike or drop off if t was a regulator.

Sounds like it has an air injector problem, but I'm no expert on the DI's.

 

[aaronm]

Thank you for your response, I have very basic knowledge of mechanics so If I sound dumb I apologise now.
Is there a way to check the air/fuel injectors, if I was smart I should of bought a more basic jetski as I have read the DI is very hard to diagnose faults without the diagnostic tool, very $$$ just spent a lot on rebuild.

 

[smc0922]

I'd recommend you get the service manual (become a premium member) and follow the test procedures.

 

[- BiRkS_]

Could be a voltage regulator problem. Unplug it and see if your problem goes away, BTW start with a fully charged battery, and remember the ski wont charge like that. If the problem goes away, its the regulator.

Also, how are the fuel filters? And to check fuel pressure, you need to do it under load to get an accurate measurement of the pump.