[mac335]

Last week i had problem with misfire cylinder 5 ( don't remember code but it was misfire cylinder 5 , spark duration to short).I changed ignition coil and problem gone. Yesterday during hard acceleration service light become and now i have a lot more of following codes:29D1 MISFIRINGS CYLINDER 5, 2E1C IGNITION CYLINDER 5,
30A4 IGNITION COIL CYLINDER 5 INPUT SIGNAL, 2C78 LAMBDA PROBE CAT 2, 29CD MISFIRINGS CYLINDER 1, 2E18 IGNITION CYLINDER 1, 30A0 IGNITION COIL CYLINDER 1 INPUT SIGNAL, 2C77 LAMDA PROBE BEHIND CAT, 2FDB, 29CF MISFIRING CYLINDER 3, 29CC MISFIRING SEVERAL CYLINDERS . My are juice box+ 100% ,solenoid bypass.

[Jeff@TopGearSolutions]

Bring the JB+ to 50%

How old are your spark plugs? IF they have more then 25,000 miles they likely need replacement.

[mac335]

40.000 miles on spark plugs,tuned since 28.000. I ordered spark plugs and coils, and i will set jb+ to 50%. thx

[rstiv4200]

hey having these exact same codes and my plugs have only 8000 miles on them i have jb4 DCI and catless dps running on map 5 what is causing this issue and what are the cat codes caused by? could i really of burned thru my plugs in 8K miless????

[max_k20]

After 8k miles I would check the plug before changing them or just try to swap your coil with another cylinder to see if the misfire follow the coil.

[MDORPHN]

Are you perchance the same guy as OvalsE92?

http://www.e90post.com/forums/showthread.php?t=830154

Neil

[BoostedE90]

Since you have a JB+ the easiest test is to remove the JB+ and undo the solenoid bypass. Do a few WOT runs and see what happens. Since you are misfiring on three different cylinders, and your plugs are not that old, sounds like a sensor might be going/is bad. There are typically 5 sensors that seem to go bad on the N54: two TMAP sensors (charge pipe and manifold), two O2 sensors, and the low pressure fuel sensor. I would rule out the low pressure fuel sensor cause you would have different codes.

Lastly your HPFP could be on it's way out.

[mac335]

Changed coils and plugs, everything was fine till today:
2E35 Injection valve cylinder 6, input signal
Error will cause a warning light
Error is currently present
Test conditions have been completed
29D2 Misfirings, cylinder 6
Error will cause a warning light
Error is currently present
Test conditions have been completed
Signal or value below threshold