I have a 2005 325i. Two weeks ago the water pump started squealing and the belt popped off. I ran the codes and got misfires and and the crank position sensor. Replaced all spark, plugs all coils installed new water pump, idler pulley, new belt, new radiator, fuel pump relay was also replaced. The suspension and the brakes are brand new as well but I don’t feel like they would stop it from starting. It cranks but no fire. Fuel pump is pumping and fuel shoots out the rail. This is my first bmw and I’m just looking for anything I may have over looked. The fuel pump is next to be replaced but before I spend more money I wanted to ask. Any help is appreciated thank you!

Morning Robert

Welcome to the Forum

A little confused as there seem to be a number of seeming unrelated issues 1st you had a water pump drive issue, when the belt came off was there any other damage caused? You replaced the Pump it's tensioner and the Radiator (was the rad damaged/leaking)

You ran a scan and found codes for Misfires and Crank sensor so changed Plugs, Coil Packs and the Fuel pump relay. Before you had the water pump issue was the car running well? Did you change the fuel pump relay because of the No Start situation or a fault?

You say "Fuel shoots out of the Rail" which indicates fuel pressure (have you measured it you should have around 3bar) so why a new fuel pump?

I would begin by checking the engine earth straps are sound and connected, check the current the starter is drawing a faulty starter motor can draw huge amps starving the rest of the system. 

Check the injectors are firing, check there is a spark at the plugs, check the MAF, check there are no vacuum or air leaks.

Last but not least what Diagnostic system do you use?

Dave