454 1997 EFI loss of power

"This problem will not go away

"This problem will not go away. The problem occurs every time that I try to go up on plane. Specifically, when I increase speed quickly to get to plane, the rpm’s get to about 3000 rpm’s and then the engine completely bogs down and looses power. If I hold the throttle there, the engine stays bogged down and does not recover and there is no power at the prop. Then if I bring the throttle back down, the engine will recover and give power again to the prop.

If I bring the boat to 3000 or 3500 rpm’s slowly, I am able to run at 3-3500 rpms.

I have recently had the following done;

1. replaced all fuel filters Twice
2. replaced Anti-siphon valves
3. replace distributor cap
4. checked knock module
5. checked ECM
6. checked base timing
7. Checked advance
8. replace water pump"

so it is throwing no codes?

so it is throwing no codes?

I recently went to the yard to

I recently went to the yard to show the mechanics and watch them work. They used a Merc computer. I have been told that this would not show everything I need. I am going to go to a crusader yard if I can not figure it out on my own.