[Ruviol]

Hi everyone,
I came to this forum since I had no luck with one addicts forum
I need your help figuring out my multiple misfire codes on my 2012 135i N55 DCT
The car was purchased with 55k miles. I upgraded Air Intake Filter, downpipe, and intercooler with stage 2+ MHD at 60k miles.
I have never has any codes or issues or any hiccups whatsoever, and the car now has 127k miles. the car run like a champ always.
I have had minor oil leakage through the Valve Cover Gasket which has gotten worse lately, so I decided to replaced the gasket and bought new BOSCH zr5tpp33 spark plugs since I was there already.
I decided to clean the dirty valve cover with degreaser and water.
I cracked the breather hose (known to brittle easily), but I fixed with marine heatshrink tube.
The new spark plugs were properly torqued to 17 ft/lb.
The Valve cover bolts were torqued to 6 ft/lbs.
I covered the Injector connectors so no debris falls inside.
I reused the OEM coil packs.
After reassembling everything back together I took the car for a test drive.
The idle was perfect, no fluctuations. The car behaved extremely normal until I hit the accelerator and it started to jerk and hesitate, and I got CEL codes :
2EE0 COMBUSTION MISFIRES, SEVERAL CYLINDERS
2EE7 COMBUSTION MISFIRE, CYLINDER 2: FUEL INJECTION DEACTIVATION
2EEA COMBUSTION MISFIRE, CYLINDER 3: FUEL INJECTION DEACTIVATION
2EED COMBUSTION MISFIRE, CYLINDER 4: FUEL INJECTION DEACTIVATION
2EF1 COMBUSTION MISFIRE, CYLINDER 5: FUEL INJECTION DEACTIVATION
2EF4 COMBUSTION MISFIRE, CYLINDER 6: FUEL INJECTION DEACTIVATION
2EFE COMBUSTION MISFIRES, SEVERAL CYLINDERS : DAMAGING TO CATALITIC CONVERTER
2F00 COMBUSTION MISFIRE CYLINDER 2: DAMAGING TO CATALITIC CONVERTER
2F01 COMBUSTION MISFIRE CYLINDER 3: DAMAGING TO CATALITIC CONVERTER
2F02 COMBUSTION MISFIRE CYLINDER 4: DAMAGING TO CATALITIC CONVERTER
2F03 COMBUSTION MISFIRE CYLINDER 5: DAMAGING TO CATALITIC CONVERTER
2F04 COMBUSTION MISFIRE CYLINDER 6: DAMAGING TO CATALITIC CONVERTER.

I double checked all hoses and connectors, they looked fine.
I cleared the coded with MHD and took it for a test drive and it was still the same, idle perfect low acceleration fine, but crazy misfiring under medium and heavy load.
I decided to install the original BMW BOSCH spark plugs back and the car still does the same thing, same codes same misfiring .

I removed the Valve cover and found the vent piece has broken off

https://www.e90post.com/forums/showt...1197637&page=2

and was laying on the cylinder head. Could this piece be glued back on? an be the cause of my misfires under boost?.



Any connector I may have damaged to cause this crazy misfiring on all cylinders but cylinder 1.

New spark plugs killed my coil packs?
I am lost
A vacuum leak maybe that I caused?
Everything in the car was working fine before the Valve Cover and Spark plug replacement.

Again this happens only under load or boost.



I appreciate the help .