1994 DT150 acceleration problems

[usswv96]

Engine will start fine and then stall when I try to plane the boat. No error codes from the ECU. I have replaced HP filter and both LP fuel pumps. HP fuel pump is putting out a constant 40psi even under load so I'm assuming thats not the issue. I'm beginning to suspect an ignition problem is to blame. Would love any ideas you might have on where to start. Thanks!

[boats.net]

Could be an ignition problem, fuel injector problem or problem with TPS.