mercury 3.0 efi shutting off

[OrangeCrush]

Need some help, My 1998 3.0 Pro max ran excellent last week (first time out) ran about 60 miles . this week I went to go out ran about 1/4 of a mile turned around to go back to the launch one beep and the motor shut off. Started It up went a couple feet beep shut off, was running about 140 degrees plenty of water pressure, oil tanks both full. tried a different cam sensor and fuel pump still cant get it to go. I can idle back to the dock but that's all. any suggestions Thanks

[fortlaudypower]

Tps? How does your voltage look?

[Steve Pope]

Have a ddt or cds connected. Will save a lot of time and money, especially as the engine fault is live, not intermittent. Easy to troubleshoot.