motor runs superb for first stop on lake then starts acting up. Bogs after 3-3500 rpms if it does run past this it surges bad. Replaced both switch boxes and stator .Also rebuilt mechanical fuel pump and replaced fuel line to engine. Still got problem. Was wondering if it could be ECU or high pressure fuel pump not much left to change. Been working on it for a while. My dad finally got lung transplant but will be in Houston A while. Thank the LORD he is doing superb though. SO get limited time to fix. Very busy between all his stuff my stuff and Grandpas stuff. Thanks in advance for help