"Have twin 1997 454 EFI engine
"Have twin 1997 454 EFI engines,after 30 to 40 min running the starboard engine start to have RPM fluxuation between 3300 to 1800 and all area in between,like its not getting enouh fuel,it will stall if you dont cut the throttle back, after this engine cool down will run good for the same amount of time. we have change the fuel pumps, both low and high pressure,fuel cooler,anti syphon valves, fuel water seperators,clean fuel and tanks.check ignition,plugs,dist,cap and rotor.we are at or wits end Can anyone help."
"Have twin 1997 454 EFI engines,after 30 to 40 min running the starboard engine start to have RPM fluxuation between 3300 to 1800 and all area in between,like its not getting enouh fuel,it will stall if you dont cut the throttle back, after this engine cool down will run good for the same amount of time. we have change the fuel pumps, both low and high pressure,fuel cooler,anti syphon valves, fuel water seperators,clean fuel and tanks.check ignition,plugs,dist,cap and rotor.we are at or wits end Can anyone help."