[bryce]

Need some help trouble shooting my car. Overview:

late '07 build e90 335i
35k miles
hpfp and injector recalls performed
FMIC, DCI, Procede Rev. III

changed spark plugs at 30k miles due to cylinder 5 misfires. solved the problem, car ran very strong since. have started experiencing cylinder 5 misfires again on the tune, stock map doesn't misfire.

exact same symptoms as before. i've ordered more spark plugs and will switch out the cylinder 5 plug as troubleshooting step. unsure if it's the spark plug yet, but if so, why would a spark plug go bad after only 5k miles? could the injector in cylinder 5 be fouling the spark plug?

[blisstik]

Are you getting any codes? Have you tried swapping injectors to see if misfires follow using the same spark plug?

[BMWsky]

Swap coils to see if the problem follows. If not, it's probably your injector.

[bryce]

i'll try and swap coils if changing the spark plug out doesn't work. here's the codes:

10927 - fuel pump plausibility
11757 - power management, standby current control
12220 - ?
12140 - exhaust flap (golf-tee mod)
10705 - cylinder 5 misfire

[BMWsky]

Does it only happen at startup, or does it happen randomly?

[bryce]

i only get the limp mode/misfire under WOT while running the procede map. on the stock map, it runs fine

[zerep1]

injector or coilpack hope for the coil pack