Hi Martin.
When was the fuel filter last changed out, also check the flow on the fuel pump both behind the OS wheel arch liner.
1
Have you checked the pot for water, as it as a plug you can undo to let out fuel to check if any water is present.
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3
Regarding the injectors i note you did a full leak back test, and one was leaking so you changed it, but how did the others fair, personally when i find a injector needs changing out i prefer to pull all four, clean them then add new copper washers.
You have a clean air filter also i presume, have you tried unplugging the MAF sensor and starting the car from cold, without a sniff of easy start.
Check the fuel rail sensor plug for corrosion to the pins, spray with contact cleaner only. there is also a new lead should it be the plug that's breaking down.
https://www.island-4x4.co.uk/fuel-pr...20-p-6875.html
You could most likely make one up for less.
T4 should help with diagnosis
