It’s been a long journey.
Completed the low mileage CGA3 swap, 1L flywheel, low mileage 1L gearbox, new clutch, new suspensions, new sensors. Refurbished the whole engine loom.
Took the car for a drive test, started 1st attempt, pulled hard and smooth, but back home it started to stall while I was parked. Now it’s not cranking again except I if slightly keep pressing on the throttle, then it runs smooth. As soon as I release the pedal it stalls tho. For information I kept the 1L ECU.
Fuel filter is new. Spark plugs color is looking good.
So now I hesitate between a few culprits:
Fuel pump
ECU
Fuel pump relay