1995 e34 520i won`t start

Could simply be trapped air. Turn the key from OFF to RUN then wait and listen. Dont try to start. You should hear the fuel pump (humming sound) run for a few seconds and then stop. If no humm, no pump, no fuel.

If you hear the fuel pump cycle on/off then turn key OFF and back to ON, wait for pump to cycle to off, and repeat a few more times. Then try to start.

If still no start, then the fuel system may need to be bled

I assume the pump was replaced because it was getting power but no fuel pressure ?
Are you still not getting fuel pressure ?
Spark to the plugs ?
Normal compression when cranking the engine ?
Security light not staying on ?

Make sure clutch switch or neutral switch if auto is making.

Almost fires? Do you mean it does fire some, that you know the plugs are getting spark? If so, then you probably need to have your fuel pressure tested to see if pump is working properly. Can you hear the pump buzz on briefly when you turn key to on? It should come on for a couple of seconds to pressurize the lines. If you don't hear it, then your pump may be bad, or something not turning pump on. Good luck.

DISCONNECT YOUR BATTERY AND RECONNECT, THIS SHOULD RESET THE BRAIN.

ALSO...WHEN YOU TURN THE KEY, LISTEN TO HEAR IF YOU CAN HEAR THE FUEL PUMP COME ON...IF NOT, GUESS WHAT? HOPEFULLY NOT!... BUT,YOU MAY NEED TO REPLACE THE FUEL PUMP, IF YOU CAN'T HEAR IT WHEN YOU TURN THE KEY, AFTER YOU'VE RESET THE BATTERY!

HOPE THIS HELPS!

When it sounds like it wants to start but won't, it is almost always a fuel problem. When you first turn on the ignition key (radio off, in a quiet setting) do you hear a faint 'hum' from the rear of the car? If so, your fuel pump is probably alright, so the next check it to remove the small, light green plastic cap (it might be black, about the size of a tire valve cap) on the top of the engine-it is part of the fuel rail and has a small pin in the center of it. With a rag in your hand, hold it over the valve, and with the key on, use a small screw driver and push the pin in-the rag will keep you from getting sprayed, if all is alright, but if you get little or nothing, you have a problem with your fuel pump, filter, fuel regulator or you may have a plugged 'sock' at the bottom of the tank.

your terminology is wrong.if it cranks its turning over what you mean is it won`t start(fire up) as you said at the beginning.anyways it sounds like you could have a fuel pump problem that stop working.this happens alot.you should check for spark at the plugs to make sure its not an ignition problem.did you notice a check engine light on when it was running.if so there will be a code in the ecm and may be the cause of your problem.

check fuel pressure should be 41-47 with key on engine off.Sounds like weak pump.

in the morning before you start your car take the gas cap off slowly and listen for pressure escaping... if it does that means your fuel pump is probably good. Also in a quiet parking spot, doors closed, driver window down,seatbelt on, stick the key in turn to half way and listen very closely and you should hear a whinning noise before you turn the key to the full start position...you should hear a whining sound ever so slightly of you fuel pump priming the pressure in the tank...if it does this then its working also.

fuel pump relay