2005 4.4i Rough Idle Turned Nightmare

[johnnyzcar]

My first post here after lurking for a while. I am at my wits end here trying to diagnose the problem. My 2005 x5 4.4i had the rough idle when cold in the morning but after would be ok. I read here that it was probably the vanos solenoids. I also had Valve cover leaks so I changed out the VCG and all the vanos solenoids. Using ISTA + I reset the learning on the servo solenoids.
So far it sounds like a diesel and has no power.

I have checked and rechecked all of the sensor connections to make sure they are not loose or in the wrong positions. Vacuum lines aren't leaking, however I did notice the PRV on the passenger side valve cover is sucking air through the little nipple thing. I tried blocking that and it seems to make it worse. My battery went dead about a week before I changed the valve covers and I reinstalled a 900 cca AGM to replace it. Voltage checks out 12.8 or so without the engine running. While running its 14 volts.

The error codes Im getting are misfires and vanos. Is there software the will tell me specifically what component is causing issues. I reinstalled the old solenoids and it is still the same. Instead of guessing and throwing money at parts changes what is the best route to take.

Thanks in advance.