A170CDi not starting

[Ukhozi]

All I did on my 2001 A170 CDI is change the seals on 1 and 2 injectors, (couldn't get 3 & 4 out) ran well before and I have fuel in the lines but it will not start, brand new Varta battery, turns over smartly but not a chuff. tried the old fuel down the inlet thing, still not starting!
Any ideas?

 

[Ukhozi]

Changed #1 & #2 injectors and it all starts OK but the fuel line came off of the pump (hadn't clipped the white slider properly) and since then no power, if I tickle the throttle I can get some speed on but floor it and it bogs down??

Any ideas?