CCV and DISA replaced- Car undriveable (revs drop)

[mcfee03]

Hi,

Firstly, this was my first mechanical task. What I did:

1. I changed my oil, and this *may or may not* have been the last straw of my DISA valve. It broke, and I thought I may have heard the PIN fall out.

2. I removed the intake to look for the PIN. The CCV was brittle, so I replaced it.

3. I removed all the spark plugs to check for the PIN. I used an inspection camera. I did not find the PIN.

4. I replaced the DISA with an OEM BMW DISA.

5. The car was idle for ~60 days whilst I waited for parts/got the intake off. Battery was disconnected for ~40 days.

6. I put the spark plugs back in, and put the intake back in.

7. I followed a video (about the intake) and noticed that my engine doesn't have a solenoid he mentioned.
Also, I cannot find where to plug in the plug that is meant to go to the solenoid. (see photo here)

8. I used some jumper cables, and left the helper car running for about 10 minutes before I started the X5.

9. Car starts strong (for a few seconds), then the revs drop down and the car stalls within a few more seconds. I can hear a hissing sound in the engine. It's extremely unstable. I tried keeping the revs up to keep the engine on- but it is extremely choppy.

What could be the cause of this? Is this all related to my battery being flat? Could I have left something unplugged?


FYI: ODB codes are the same as before I did any of the above:
Powertrain Faults P1349, P1351, and P1354 (Misfire Cylinder 4/5/6 with fuel cut-off), MAF low input, O2 Sensor Heat Circuit and Random/multiple cylinder misfire detected