2000 5.7 craps out when going above 3500

[chs marine service]

so i have this 5.7 v/p. carbureted engine that when after getting up on plane, the rpms take a nose dive and if i pull back on the throttle, it will sputter but clear up and i can continue to run it. if i leave the throttle down, it stalls out. it starts right back up each time. the carb was rebuilt last fall due to a faulty idle circuit and it ran fine since. im thinking ignition issue now but have not come across a bad module that would allow the engine to start right back up. any thoughts?

anh

 

[FunInDuhSun]

Change the fuel filter(s) before anything else. KISS principle!

 

[Bondo]

Ayuh,.... Sounds like it's runnin' outa gas,.... as noted, examine the contents of the fuel filter,...

 

[chs marine service]

FF is new this spring, i will change it out though. also already opened the gas cap to see if it was a clogged vent, no change.

 

[Lou C]

There’s usually an anti siphon valve on the fuel tank where the fuel line attached to the tank. If these corrode or get clogged with debris you can have that problem.