Fuel system air leak

[Brassmonkey]

I have an air leak in the fuel system. For now I have to pressurise it with the pump on the fuel filter before it will start, there is no fuel leaking out so i suspect its around the filter or pump. Where should I check?

[geeves]

filter is easiest to check and cheapest to fix. Also if the filter was recently changed its a likely spot. On the pump air in the system is most commonly from the shaft seal. Its pulleys off to change.

[Brassmonkey]

The injector pump should be good as the seals have just been replaced, I'll check out the fuel filter seal. Is there a gasket for the pump that's on top of the filter?