Memorial day Madness

Alright so ran my 99 air nautique this weekend and ran great for a while. Then went to puts around the lake and it died. Wouldn't start up for about 20-30 mins. Then ran fine again. Did it again. Then Saturday it was a little hotter outside and ran fine. It sat for a while. Ran it hard and it died at high RPM's. Sat for 20-30 mins and started up again. Did this again also.

Ran a computer scan on it first time it said 22 122 22 and that was after pulling a bunch of wires and trying to start it. Cleared the codes. Ran it until it died and ran the code scanner again and came back w/ nothing.

I've read on the forum about bad MAP sensors. So I picked one up and I picked up a fuel pressure tester.

Checked the fuel pressure right away. Turned the key on the on position (not starting). No fuel pressure. Again... nothing. Started it up and it jumped up to about 32. Shut it down and turned the key to the on position (not starting) and fuel pressure rose to about 39. Ran it until it died and then checked the fuel pressure. No fuel pressure. Waited about 20-30 minutes and then fuel pressure came back started up and ran.

Unplugged the connection to the low pressure fuel pump and it started. Unplugged the connection to the high pressure fuel pump and it didn't start.

My question is could the MAP sensor be tripping this? Or would it be some fuel pump relay? Or the high pressure fuel pump? Or???? Any feedback is appreciated. Thank you for your time.