My boat has twin 4.3 mpi. The starboard engine bogs bad after 2000 rpm. I installed a new fuel line From the tank to the spin on filter-an put it where the port engine fuel is supplied..still bogs. New plugs, coil, rotor & cap, still bogs, swapped engine control module, still bogs, disconnect the shift interrupter, still bogs, fuel pressure on both engines checks the same around 45 lbs. swapped out fuel pressure regulator on the fuel rail, still bogs. Also swapped out idle air valve.. still bog. New fuel filter to. When the throttle is full open it pops back thru the throttle body. Engine is a 2004 model. Any ideas?.?? I am kinda well not kinda I am stumped.