HELP!! Car Not Starting.

[Juggernaunt911]

UPDATE: JAN 4/2016 - PROBLEM(S) RESOLVED.

Just wanted to provide an update, it seemed that after the countless hours of troubleshooting the "crank no start" issues has been resolved. There was no "faulty" component that is the only crappy thing, it appears that the problem was resolved during our troubleshooting. We suspect that when we were disconnecting and reconnecting harnesses, fuses, ETC we could have fixed a loose connection somewhere. I know its not the answer we wanted, but hey I will take it! It has been well over a month in cold weather and no issues as of yet!

We also had a battery draw problem, through parasitic tests we determined the issue was with the drivers door actuator. Actuator was replaced and no more issues.

Wanted to thank everyone again for there input and suggestions, was greatly appreciated!


Hello,

Have been running into issues with my X5 and hoping someone here can shed some light on my situation.

Symptoms:
Car will not start after sitting overnight and especially cold mornings. Car will crank without issue but wont start. After about 10 times of trying finally it will fire up and will be fine the rest of the day. I find the problem is much worse on cold mornings, for example this morning it was about -5c and after about 20mins of trying she just would not start.

There are no codes/check engine, it is a 2006 X5 4.8is.

Here is what has been done so far:

Replaced Fuel Pump Relay
Brand New Battery (Dealer Installed)
Fuel Pump
Spark/Ignition tests ok



When the car is acting up and not starting, we had no pressure reading at the rail this is what lead me to believe it was the pump.

Next steps, I will do some further pressure testing (leak down etc.)

Other possible culprits I can think of...fuel filter (regulator could be bad I guess???), crank sensor (but not sure if that makes sense as this only happens on cold start), Ignition switch?? I also thought of leaky injector, but there is no smell and when it acts up I have tried flooring the gas to open up and shut injectors but still no change.

All recommendations and suggestions would be greatly appreciated! We are coming into the colder months here and need this to get resolved. Keep in mind this only happens on cold start in the mornings, once it starts it can be turned off and on without issues.

Thanks!!