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BMW 3-Series (E90 E92) Forum
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135i n55 dct misfires cyl 2,3,4,5,6 after VCG and spark plug replacement !
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11-13-2022, 09:08 AM | #1 |
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135i n55 dct misfires cyl 2,3,4,5,6 after VCG and spark plug replacement !
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 . |
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