Hi, I run a small garage in Tamworth, I took on this job for a friend, his fuel pump was leaking (the high pressure pump run off the timing chain on the front of the engine). I fitted a seal kit to the pump but it still leaked and upon further inspection found it to be cracked, so he bought a second hand pump and when I fitted it, no fuel would come out of the high pressure side, the low pressure side was bled, the pipes delivering fuel to the pump are clear so I can see there are no bubbles, but despite turning the engine over til I was pulling my hair out no fuel would come out of the pump.. So I decided the pump was faulty, perhaps a blocked one way valve, debris or whatever, so the supplier gave me another one, and ive had exactly the same problem with this pump.. Now the first pump I re sealed bled up and ran as normal so I know my bleeding method is correct and the engine does run. He is now sending me a third pump. If anybody can shed light on my problem I would be very grateful, ive been in the trade since I left school 13 years now, this issue has got me scratching my head.. This is the W210 engine, 3.2 straight six, 2001 model. Many thanks, Auto Poole.