Once again I need to call on the remaining early 240 and K-jet experts still lurking on this board.

The Car:

1980 242, Stock K-jet, rebuild engine, new wiring harness, all stage zero items addressed.

The Problem:

The car has a starting problem related to how long it has been sitting. The longer it sits, the longer cranking time is required to finally start. After shutting down, a 10 second wait is almost instant start up, a 20 minute wait will require 10-15 seconds of cranking time. A 40 minute wait will require 15-25 seconds. More than an hour wait will require 30+ seconds. All night wait also requires 30+ seconds. It has never completely failed, I've always been able to get it to catch eventually. Once the car starts, it runs and idles perfectly at all speeds, NO indicators of performance problems. It has also never died on its own after starting.

What I've tested:

I've tested for spark during the cranking condition and it's always been strong. I pulled injectors during cranking and noted there was no fuel spray. So I removed the K-jet air bladder, shorted the fuel pumps for continuous run and started lifting the flapper valve. I get a good strong conical spray pattern from all injectors when doing this. So I reassembled the injectors, shorted the pumps and tried cranking. The car still exhibits the long crank times even when the fuel pumps are continuously running. This also confirms the fact that I can hear the pumps run and the pump relay click when I'm cranking normally.

It seems like something is inhibiting any fuel flow during normal cranking. However, because I've confirmed running pumps, good spray from all injectors, and normal driving performance, I'm at a loss as to what else in the K-jet circuit could be arresting fuel flow during start up that seems to be wait time dependent.

Any thoughts?