Cranks, wont starts, please help!

[bikramsingh]

Hi folks! Need your help.

So I came back from the gym a few weeks ago, parked the car in the driveway and all was good.
Next morning tried to start it but it would not start, only cranked.

Scanned for codes, got a P1349, misfire in cylinder 4.

So I replaced all of the spark plugs (with NGK) and also installed new Bremi ignition coils (with boots).
Still would not start.

So then I did some research and after some diagnostic tests for fuel pump, I installed a new fuel pump (Delphi).
Still would not start.

My neighbor was around and suggested I floor the gas pedal and try to start the car.
Did that and it cranked and turned on! But after letting it idle for about 6/7 mins, it just shut off on its own.

Now back to cranking and not starting.
In some tries, it "kind of" starts and then turns off after a few seconds.

Tried to scan for codes but nothing.
Any help would be very much appreciated.

The following lights are on since this start problem:
Service Engine Soon light, the battery light, and an oil lamp looking light.

There's about a quarter tank of fuel in the car. Oil change was done a while ago, although not recently.

Side note: I replaced the water pump, water pump pulley, fan clutch, and did a coolant flush about a month ago. The car was running fine and there are no leaks or coolant problems in sight.

Info on car:
2001 BMW X5 (E53)
130,000K miles

Thanks in advance!
Bikram

[robsbmw]

Look at my post. Try a new fuel relay.