Have you managed to run long enough to see if HEAT makes it better - worse ?
The evap valve does nothing. Disconnect the pipe from the inlet if you think it is causing an issue.
Have you check the fuel pressure whilst the car is running yet?
Have you check the fuel pressure whilst the car is running yet?
UPDATE: Tested the fuel pressure and it was below 1 bar. Ordered a complete sender/pump online that said it was for my model....it wasn't - sent it back and found a 3.5 bar pump on it's own....fitted that....pressure worse....found a leak in the corrugated pipe ...fixed that.... still no pressure....took complete unit out of the car to test it.... tested it on my bench sbmersed in a container of petrol and the pressure release valve was faulty so found the complete correct sender/pump unit...fitted it, now have 3.5 bar and running perfectly. happy boy!