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      04-06-2020, 09:57 AM   #1
Sporah
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Drives: BMW 535i xdrive
Join Date: Apr 2020
Location: detroit

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Exclamation N54 Codes and reduced power after VC job

Hello all!
I'm desperate for some help here... I have a 2010 535i xdrive with the N54.
Yesterday, I put 10 hours into changing out the valve cover for a new one. I started by disconnecting the negative battery terminal. The middle gasket was leaking oil into my spark plugs and dripping down to my exhaust, where it burned up. I took the spark plugs out and let the minimal amount of oil drip down into the cylinders where it could be burnt off. I watched a DIY and followed everything step by step, thought everything would be perfect now.
Today, I turned the car over after pressurizing the fuel, and I have engine malfunction, reduced power!....

I immediately went to scan my codes, and here is what came up:

P0174 System Too Lean (Bank 2) [comes up twice on scanner]
P054B Cold Star "B" camshaft position timing over-retarded bank 1 [comes up twice on scanner]
P0301 Cylinder 1 misfire detected [comes up twice on scanner]
P0305 Cylinder 5 misfire detected [comes up twice on scanner]
P0304 Cylinder 4 misfire detected [comes up twice on scanner]
P0306 Cylinder 6 misfire detected
P0300 Random misfire detected

Does anyone have any idea as to what is going on? I did this job myself to try to save $900 in labor, would love to resolve this issue without having to pay $150 to get it diagnosed by a shop!
Thank you all for your time
Appreciate 0
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