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ALX5 09-27-2014 06:01 PM

where is cylinder #4
I got a code P0304 misfired cylinder 4. I checked on google and found 4.8L firing order is

1 2 front of car
3 4
5 6
7 8

I wonder is this correct? I did swap the ignition coil 4 and 2 still get the code. Thinking it could be the spark plug or could be wrong firing order. Help please


gregg3gs 09-28-2014 12:52 PM

Sorry, you are wrong.

N62, N63, S65
– Twin cam (two cams for each bank), 4 valves per cylinder, produced from early 2000s to current Cylinder numbering is 1 through 4 on passenger (right) side and 5 through 8 on driver (left) side. numbers 1 and 5 are at the front, 4 and 8 are at the rear.
Ignition firing order is 1-5-4-8-6-3-7-2 (except S65 = 1-5-4-8-7-2-6-3).
Bank-1 is the passenger side (cylinders 1 through 4), bank-2 is the driver side (cylinders 5 through 8).

Also, if your spark-plugs are over 100K it may be just that. BMW suggests you replace them at 60k.
Good luck.

- BMW Engine Firing Order and Cylinder Location (Bank-1, Bank-2), 4-cylinder, 6-cylinder, V8, V12 | Bavarian Autosport Blog
- http://www.bimmerfest.com/forums/att...5&d=1300909982

ALX5 09-29-2014 06:36 PM

Thanks Gregg3gs. Mine is only 80,000+ but will do the plugs and air filter since I already have access to those things.


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