I have tested it at the schrader valve too. I wanted to plumb it in at the filter to see if the check valve was bleeding off. I figured this would eliminate the chance of any other component up stream of bleeding off and limit the possibilities to the pump only. It had a very slow bleed off, nothing fast.

I have been driving the car today and the problem remains. Start the car 10 minutes after parking it with the engine hot, and it is still hard to start even though it shows 40# on the FP gage. It seems like as soon as you turn the key forward it will let off a small pop and struggle to run and then about 6 seconds later finally run right. WTF.

Again if I turn the key off/on three times to restart, fires a bit better. I am at a loss here. Just does not make sense and I dont see how it can be ignition related.

I am starting to think it might be a flooded condition. I held the pedal to the floor during startup and it started much more like it should. I know the tune is off and it is getting a new dyno tune this weekend to account for the new larger injectors. I adjusted the injector constant to account for the new injectors but maybe there is another setting that needs to be adjusted, like maybe for hot prime vs. cold prime. Lets see what happens after the new dyno tune.