Fires then dies. HELP

[Ozruss90]

This situation happened months ago after I removed the cam angle sensor to replace the Oring due to an oil leak. After the sensor was replaced, the engine would fire and then dies within a few seconds. At the time it was suggested to be the fuel pump at fault. So without confirming I ordered a new fuel pump/sender assembly.
Still have the Fire up and die within seconds scenario. Fuel pump is operating and pumping fuel as it should.
Need help as to where to look next. Unfortunately I don?t have an OBD1 scanner. I have read that the engine should run even without input from the cam angle sensor, so ruling that part of it out.
Very much a coincidence though that this start/stop situation happened immediately after I replaced the c/a sensor.
HELP from the brains trust on here appreciated.

Cheers, Russell. 🇦🇺 AUSTRALIA