This can't be right?, D-Jet Options

[FlatSix]

Background:
Car is 1976, and has not been driven for many years (don't ask). The engine is now a 1.7 from 1970. I have replaced all hoses, fuel lines and fuel pump.

Problem:
The engine will start, run for a few minutes then stop however when the engine is running the fuel pressure is ZERO! Activating the fuel pump by pressing the relay in the engine compartment with my finger brings the fuel pressure up to 28psi and stalls the engine.

The car will NOT then restart. When trying to restart I CANNOT always hear the fuel pump run. The fuel presure is 28psi though.

Aim:
To get the engine running as it should.

[FlatSix]

I've made some progress. I've taken apart and inspected wiring to ignition switch and main fuse box. This didn't show up anything notable to report.
I plugged in the fuel injection test box I purchased from James T. I went through the tests and everything checked out ok so I went to start the engine. The fuel pump ran and the car started as you would expect. The engine did not stall after a couple minutes unlike previously.
I disconnected James' box and went to start the engine. NO fuel pump running for 2 seconds. Connected the test box back up - everything ok! Repeated exercise several times. I have now 'bent' the connectors on the white plastic strip in a little and that seems to have solved that issue.
So I can now get the engine running. I'm not sure about the idling though. Have a look at the video. The revs oscillate between about 900 to 1800. Note the CHT sensor is new. When I use the test box to read the resistance of the CHT it is in line with what it should be (about 500 ohms, the engine isn't that warm yet). When I use the test box to substitue for the sensor and I 'dial in' about 500 ohms for the resistance then the engine idles smoothly at about 1200rpm.


https://www.youtube.com/watch?v=gvRmkUeS024