Problem with codes P0313 P0171 P0174

[elvictoro]

Hi,

I've got the following fault codes on my 2003 525i Touring with 146k miles: P0313, P0171 and P0174. I have been trying to diagnose it by replacing the vacuum tubes in the engine bay, new valve cover, replacing the CCV system, new intake boots, New DISA o-ring as well as new o-ring for the oil dip stick. Also, I've ran a smoke test without finding any leaks as well as cleaned the MAF with CRC air sensor cleaner.

One additional thing that may or may not be relevant is that i removed the entire intake during the CCV replacement, and I am not entirely sure I had the P0313 code before doing that. There doesn't seem to be any leaks though as the re-install went smoothly and everything fit together without forcing it.

Does anyone have a clue on what might be the reson for the fault codes?

Thanks.

[Wheeli1]

I just replaced everything hoses gaskets etc. now when I start my car it won’t idle it just dies it will run if I Revit up if I step on the brake pedal the car instantly dies any suggestions what the problem could be

[StephenVA]

Try this one
https://video.search.yahoo.com/searc...c&action=click