GT40 won’t idle

Distributor is a good guess since it’s running rough and wants to backfire like it’s out of time. I’ve checked the wires. They’re in the correct order. New cap and rotor. No moisture. No play in the rotor movement.

1998 SN GT40
Will turn over and catch immediately but dies within 4 sec.

New plugs, wires, cap, rotor last year and would run well. Sometimes a hard start when hot. This led me to new injectors this past winter. New intake gasket. Injectors are 24lb blue top Mustang. Also installed perfect pass over the winter.

Put it in the water. Cranked up. Idled rough. Got it out on the water. Ran well. Got back to boat house, idled rough and died.

Will run if give it some feathered throttle. Not smooth and will backfire. Seems like a too lean condition to me. Fuel pressure steady at 40. Checked gasket for leaks under intake. Disconnected
PP linkage and no joy. TPS and IACV are getting power.

I’ve been through the Poor Man thread and the PCM handbook. But I’m not the best modern engine mechanic.

Any help would be great! Thanks!