Gonna bump this as I still have this problem and it's wrecking my head. I'm fairly convinced the car is losing fuel pressure when sitting for round an hour or two. Since starting this thread I have replaced the fuel pump and filter/regulator. Checked the injectors today and no leaks. There is no smell of petrol anywhere and can't see any signs of leaks. I cleaned the throttle body last year and the car has done very little mileage since, also I have checked the fuel pump relay and no scorching.

I think I have covered every possible cause mentioned on the various forums but no luck.

I need to turn on the battery round 15-20 times to get pressure back up before it will start. If I don't do this the car will fire but conks immediately.

Anyone, please, have any idea what the f@*% is causing this to happen.