Start jiggling wires when it does it. Does it only have trouble when it's a hot start?
Make sure the bulkhead connection through the firewall is tight. Had mine do that once, the screw holding the 2 halves together had backed outNo. Its random. I got it to run this morning, shut it off, no start. It did the same thing 20 minutes later. I am not getting power out of the fuse block to the fuel pump power wire.
Checked that as well. Like i say, i am getting nothing out of the firewall to the fuel pump.
Ignition module? IIRC with a bad module it can still start with gas dumped down the throat.
I think i have it fixed. Combination of a questionable wire and loose ground. I hope that was it.
Was it that splice I was talking about?