This wasn't the REC file I was hoping for.
Here is what I see.
Voltage still too low. this might explain the numbers I'm seeing and the many sensor spikes at unusual times.
Sea water pressure too low and has some of those spikes. Maybe this affecting the WOT? I'm not sure.
Fuel trims very high (very close to setting fault) at strange times and have a wider difference between port and stbd that what I'm used to seeing.
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phi (equivalency in Diacom) both target and actual are much higher then normal. Also unusual spikes. From the manual "The difference between phi and DesiredPhi can indicate things such as fuel restriction, fuel quality, high fuel rail pressure, fuel injector failures"
It appears trim sensor is inop or you're not using the trim. Are you using trim? This makes it hard for me, I'm not there so I need to look at demand, demand linear, TPS, etc. to try and figure out what is happening with the steering wheel and waves. Can you tell me a little about this run. I can see you going in and out of gear (this is hard for me to interrupt because Diacom calls these switches by different names) then Merc does. Also many times you back off on the throttle before increasing it to get to the next RPM range. I'm not there so maybe water conditions?
When I look at the (little over a minute) WOT part of the file. I see you have the throttle 100%, the PCM is commanding 100%, but for some reason the TPS is slowly closing to 65%. I can see no reason for this to be happening anywhere in the REC file. It's very normal to see this at demand linear less then 100% because ACS is trying to keep a constant RPM, but not at WOT.
I have some questions.
Have you replaced O2 sensors? If so, did you use OEM?
Have you dumped the fuel filter into a clear and clean glass to inspect? Have you replaced the filter element?
Have you tried running the engine on a different fuel tank filled with the best gas you can buy?
Do you have a picture of the stickers on the PCM?
Next time you do another Diacom run, you should trim up far enough to blow out the prop at WOT. It might help to see what happens when you hit the rev limiter. Don't worry about over reving the engine, the PCM is way to smart to let anything bad happen.
So to sum up, I can see why you can't get over 4500, I just don't know why.
