Symptoms of a bad IP delivery valve?

[bipolardave]

Last night I replaced some of the clear fuel hoses. I've had the fuel filters and injection lines off before soo I think that I got the system vented properly afterwards.

The car starts but shakes and sputters. Dropping it into gear outright kills it.

Whlie putting the #1 injection line back on, I had to keep fidgeting with the connection at the IP. The knurled knob atop the delivery valve kept spinning with the fuel line. The aluminum "wedge thingie" was missing so it wasn't locked in place.

I've loosened and reconnected all the hoses and vented again. After letting the car sit overnight, I got it to fire up again but it still sputters. That tells me that it didn't lose it's prime overnight so I think that my supply is back together ok.

However, if I loosen #1 hard line a the injector and pump by hand, it's always gurgling fuel. Not so with the other injector lines. I've repeated this several times with the same results regardless of crank position.

My hunch is that I've either damaged the delivery valve or ruined the washer/seal beneath from overtightening. Now, that delivery valve is partially or fully open all the time and #1 injector is constantly getting fuel but can't build up enough pressure to open the injector.

Is this logical? Anything else to consider?