2001 5.7 GSI flooding

[Campwinkler]

2001 Monterey 262 cruiser with a Volvo Penta 5.7 GSI PEFS.

Engine has 910 hours. It used to run great and get up on plane although it took a while with trim and tilt adjustments.

Now it hesitates on acceleration under load and won’t go faster than 8 knots. We can feel a vibration and smell fuel on the water and If you push the throttle hard it will flood and stall. In the driveway with water muffs on it starts up instantly and idles perfect. Going throttle up (driveway) it will hesitate but then catch up and run smooth.

So far I have replaced; plugs, plug wires, dist. and rotor, MAP sensor, Throttle body sensor, thermostat and housing, temp gauge sensor, oil switch sensor, removed both fuel pumps and cleaned. Removed Throttle body and cleaned. Also ran engine on external fuel can.

All of this had no change.

 

[alldodge]

Welcome
Looks like you need to reload your parts cannon

What kind of testing have you done prior to replacing parts?

Have you checked fuel pressure and if so what was the reading?

 

[Donald0039]

Are you talking EFI or TBI?

 

[kd4pbs]

What codes are set in the ECM?
Replacing the temp gage sensor is just for the temp gage - not the ECM, so that would never have been a problem for the engine performance.
I don't understand what a "throttle body sensor" is - do you mean throttle position sensor? If so, and I had to take a WAG without knowing the fault codes the ECM is flagging, I'd next replace the coolant temperature sensor. You've already replaced two of the three most important sensors the ECM uses to compute air-fuel ratio.