Cylinder 6 Misfires under load

Occ224 · 08-19-2018, 02:34 PM

2008 bmw 335i 90k miles
Combustion Misfires cylinder 6 not sure the exact code i dont remember but thats the only problem. In the morning it pulls very well but when it gets warmed up it will start misfireing under load. Around 9 psi. It wont misfire with stock tune but it with stage 1 tune. It did not use to misfire with stage 1 tune. No extra bolt ons no burble just a stage 1 tune.
Replaced plug
Replaced coil
Replaced fuel injector
Coded fuel injector
Tried to Cleaned the valves in cylinder 5 and 6 as best as I could not to good of a job but enough to have fixed the problem if thats what it was.
Checked my hardest for vacuum leaks
Im stumped..
Help Please

Occ224 · 08-19-2018, 08:23 PM

Anyone?

08-19-2018, 02:34 PM	#1
Occ224 Private First Class 13 Rep 119 Posts Drives: 2007 E92 328i Join Date: Feb 2018 Location: Niceville FL iTrader: (0)	Cylinder 6 Misfires under load 2008 bmw 335i 90k miles Combustion Misfires cylinder 6 not sure the exact code i dont remember but thats the only problem. In the morning it pulls very well but when it gets warmed up it will start misfireing under load. Around 9 psi. It wont misfire with stock tune but it with stage 1 tune. It did not use to misfire with stage 1 tune. No extra bolt ons no burble just a stage 1 tune. Replaced plug Replaced coil Replaced fuel injector Coded fuel injector Tried to Cleaned the valves in cylinder 5 and 6 as best as I could not to good of a job but enough to have fixed the problem if thats what it was. Checked my hardest for vacuum leaks Im stumped.. Help Please
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08-19-2018, 08:23 PM	#2
Occ224 Private First Class 13 Rep 119 Posts Drives: 2007 E92 328i Join Date: Feb 2018 Location: Niceville FL iTrader: (0)	Anyone?
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