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Discussion Starter #1
Hi guys and gals,

I've been having an issue with my 2004 316i (n42) that developed an acute and constant misfire. I haven't been able to solve it. It was initially on cyl 3&4, I switched coils 4->2 and 3->1. The misfire changed from 3&4 to 2&4.

After that I replaced all 4 coils and all 4 plugs, but the misfire remains, but it's back to 3&4. The car sounds absolutely dreadful, and it is undriveable. The errors that pop up are

-29CC and 29D0, (multiple cylinder misfire and Cylinder 3&4 startup misfire)

- 2E27 spark coil cylinder 4 in 3. ignition sequence

-2A67 "vvt action" "fault currently not present"


I have no idea where to look next, could it be timing? I have a timing gun, do I need other specialized tools to check that? Could it be the wires running to the ignition coils?
 

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Nuclear engineer
02/2012 X5 35d M57Y CPO 99K miles NOKIAN WR G3 12K miles
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17,538 Posts
***8220;Ignition sequence***8221; 4 in 3, sounds like scrambled ignition wires.
 

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Discussion Starter #3
I have a multimeter and other electrical tools, but no idea where I can measure for continuity. Where can I find that info, shop manual?
 
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