My buddy has a 21ft eliminator daytona with a blown 482 bbc that has dual holley 750s. He ran it labor day weekend and it ran perfect. The next time he took it out it ran fine at idle and on the trailer, but as soon as it got on plane it craps out and dies. It will fire right back up and as soon as you get on plane, same thing again. He replaced a bunch of ignition stuff, plugs wires, msd box, cap and rotor, and the battery thinking it was that, but it still does it. Hes not computer savvy and I told him I would see if any of the experts wanted to chime in or if anyone has had this problem before. Thanks Fellas.

My buddy has a 21ft eliminator daytona with a blown 482 bbc that has dual holley 750s. He ran it labor day weekend and it ran perfect. The next time he took it out it ran fine at idle and on the trailer, but as soon as it got on plane it craps out and dies. It will fire right back up and as soon as you get on plane, same thing again. He replaced a bunch of ignition stuff, plugs wires, msd box, cap and rotor, and the battery thinking it was that, but it still does it. Hes not computer savvy and I told him I would see if any of the experts wanted to chime in or if anyone has had this problem before. Thanks Fellas.

Sounds like water in the gas to me. 

Electric or mechanical fuel pump?


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I think it's electric.

What kind of ignition coil? Sounds like a coil is dropping.

Might try a spare coil.

Water was my first thought, or a collapsing fuel line on the intake side of the fuel pump.

GT

He's running a mechanical fuel pump, not an electric. And we are going to mess with it today so we will see. Gonna probably drain the gas and start fresh there and I'll tell him about the coil.

What kind of ignition coil? Sounds like a coil is dropping.

Might try a spare coil.

Water was my first thought, or a collapsing fuel line on the intake side of the fuel pump.

GT

He's running an msd blaster ss coil.

He's also checking the fuel lines today.

Was this problem ever fixed? Im having the same issue, but my fuel pressure drops as well.