P0171, P0174 and P0430 errors

[Metaalicwolf205]

I’m not really sure what’s up with it but I know that at about 1/4 tank the car loses all power and want to go unless at high rpm. Does smell like burning oil if you do that. I know it needs a new secondary air pump and I have one on the way but i do not know if that will fix it. Wondering if anyone has a clue?
2003 z4 2.5i

 

[domsz4]

P00340 i think is linked to a cam shaft position sensor failure, fairly easy and cheap to replace. also linked to it being sluggish to start

The other 2 codes seem to be relating to lean burn occurrences. I had the whole poor idle and rev hunting but not excessive and found that the boot between the air box and the throttle body was shot. Replacing it sorted the symptoms

 

[paddy wright]

I would check the air intake boot to see if it has a split on the small pipe that comes off it- common fault that can throw lean codes- see here for what to look for.
https://z4-forum.com/forum/viewtopic.php?t=70223