Car wont start

Asked by alberttafoya Jun 19, 2013 at 11:53 AM about the 2001 BMW X5 3.0i AWD

Question type: Maintenance & Repair

I have a 2001 bmw x5 3.0, I was getting a bunch of codes, but to make story short. I
finally got them all off, but still had a problem starting, so the last thing i was going to
change was the fule filter which was done also. I changed gas from local station that I
use prem. gas. then I thought if I use a better gas it would help then  when to Shell and
put their super prem.  I came home right away pared it til next morning, and when i
when to start it, it felt like it was just bogging down and i couldn't drive it without
stopping and shutting down, Good thing i was close to home, anyway, that's when I put
the fuel filter in and still having same results of it bogging down right away. Sorry so
long, but thought i better say some of the story

4 Answers
5,915

Michael answered 11 years ago

Have you repaired or replaced your DISA valve? It is the throttle body box attached to the intake manifold. You cold also have a dirty MAF sensor. I just went through a similar situation with my E39 2.5.

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5,915

Michael answered 11 years ago

Most shops will also recommend a smoke test to see if there is a vacuum leak. You could have simple rubber vacuum hoses going bad. The last possible option is you CV valve or oil separator. The vacuum line dry out and need to be replaced if they have not already been replaced.

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Robert answered 11 years ago

Check codes agian as Tom said you should have something in there for this. As Michael mentioned you should check for vacuum leaks by spraying throttle cleaner around the intake and intake boots and see if engine revs up. Also you should check your crankcase pressure by removing the oil cap while the engine is running. It should take a slight amount of force to remove. If it excessive then you need to replace your oil seperator that has failed causing the engine to suck unmetered air and running lean. Also you could unplug the mass airflow sensor and see if it runs better. Just a few suggestions please let us know how it goes.

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GuruK27R3 answered 4 years ago

My E53 had a similar problem (and a new one which is why I'm searching). The car would run and drive but very herky jerky and felt ready to die the whole time. Turned out it was my fuel pump dying. Replaced it under the back passenger seat and ran perfect again

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