2001 Volvo P. 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.

 

[Michael Clemensen]

Fuel pump pressures?? Injectors???? Our '96 Ford Powered VP was having performance issues, removed the injectors and sent them in for testing and cleaning. Best of 8 flowed 80% worst was 20%. After cleaning they were all equal to design flow. Engine was remarkably more responsive.

 

[CampWinkler]

Fuel pump pressures?? Injectors???? Our '96 Ford Powered VP was having performance issues, removed the injectors and sent them in for testing and cleaning. Best of 8 flowed 80% worst was 20%. After cleaning they were all equal to design flow. Engine was remarkably more responsive.

Well that could be except this engine has Throttle body injection. I suppose there could be too much pressure ? Testing in the driveway it will throttle up but has to catch up, so you can hear it trying then catches up to the throttle position and runs smooth.