[Jackson54]

Hi all, long time reader, first time poster. Car is a 2010 E90 335 M sport. Car is at 136,XXX miles and was purchased at 118,316 miles. Was up in Connecticut visiting friends (reside in NC), drove the car up there, gave it multiple breaks on the way up to let things rest, everything was great, no hiccups. Fast forward few days before I was going to leave driving on local highway at 70ish in 6th gear, reduced power/half check engine light, start to pull over, then audibly can hear a knocking/ticking start. Coasted car to off ramp as best I could and had it towed back to friends. Tools were limited up there so had to get it trailered back to NC. Now I have the car in front of me, knocking/ticking is still present. Flashed back to stock tune. Same results. Will be doing compression test soon. All work on the car done by myself. Mods, codes and maintenance below.

Codes:
2ACC: DME: DME master relay, shift delay
2DEC: DME: Power Management, battery
2E69: DME: Knock Sensor signal 2
2F8F: DME: Accelerator pedal module and brake pedal, plausibility.
30BA: DME: Injectors 1,2,or 3 or DME, internal fault.
30BB: DME: Injectors 4,5, or 6, internal fault.
3100: DME: Boost pressure control, deactivation.

Mods:
XHP Stage 3, MHD stage 2+ 93 oct.
VRSF Chargepipe, dp's, inlets, dci's
No secondary cats, no mufflers.
CSF fmic, tial BOV, bov manifold adapter
Vac lines

Maintenance: Index 12 Injectors. OFHG & oil cooler gasket4K miles ago, VCG & oil pan gasket 12K miles ago, oil change every 3,500 miles, coolant flushed every 8K, liquimoly 5w-40, coolant changed every 10k miles, plugs changed every 5k miles NGK 97506 1 step colder, stock coils, new radiator, trans flush 3k miles ago, VANOS solenoids replaced 3k miles ago intake manifold gaskets and carbon cleaning 3k miles ago throttle body replaced 2k miles ago w gasket, upper rad hose etc...

[Emilime75]

Anytime I see someone post a multitude of random codes, 1st thing I suggest is checking battery voltage, alternator, engine to chasis to ground strap, terminal corrosion...

Not sure what your knocking/ticking could be, but maybe the alt has failed causing a drop in battery voltage.

[Jackson54]

Originally Posted by Emilime75

Anytime I see someone post a multitude of random codes, 1st thing I suggest is checking battery voltage, alternator, engine to chasis to ground strap, terminal corrosion...

Not sure what your knocking/ticking could be, but maybe the alt has failed causing a drop in battery voltage.

Battery and alternator are all good checked with multimeter. Codes were pulled before I threw it on a charger after car hadn't been ran in month and a week or so, suspect that has something to do w the 2DEC code. Not having any issues relating to electronic functions.

[Jackson54]

Two tests on each cylinder. Done on cold motor.
Cylinder 1: 135, 135
Cylinder 2: 135, 133
Cylinder 3: 120, 120
Cylinder 4: 120, 105
Cylinder 5: 125, 125
Cylinder 6: 135, 140

Thoughts? Want to try this on a warmer motor but fear for further engine damage. Time to source a new long block?

[feuer]

Buy new ecu.

[Tambohamilton]

Originally Posted by feuer

Buy new ecu.

+1. All those codes can't just happen at once, surely.

Also, could be useful to know which codes return immediately after clearing them and running the engine?

[Steve Sas]

Don't jump to conclusions. First clear codes, power cycle the car and read codes again.
If codes clear start car up and read codes again.

I would check oil pressure when starting the car and make sure its ok.

Maybe a bad DME. Heard people talking about MOSFET issues with some.

[Jackson54]

Originally Posted by Tambohamilton

+1. All those codes can't just happen at once, surely.

Also, could be useful to know which codes return immediately after clearing them and running the engine?

Cleared codes and ran engine as long as I felt safe (knock) same codes returned with exception of battery power management, assume this is because battery is at correct charge level now. I understand a large group of random codes usually relates to batt/alt/DME however with physical/audible knocking present and the bank 2 knock sensor being tripped, I do not think this is the case. DME is MSD81 will be pulling out soon to check MOSFETS. Will post up a video of the knocking to give a better idea to you all. Appreciate the replies. 👍

[trb1]

Pretty sure 30bb/30BA aren’t gonna be a thing unless your mosfets kill themselves or you kill all your injectors on that bank at once. I’m on the ecu train

[Jackson54]

Pulled off oil filter, heaps of copper/brass colored particles in oil. Fairly certain I've spun a rod bearing at this point. Took pics as best I could with my selfie camera as my front camera is broken lol.

[Steve Sas]

Don't think MSD81 was affect by the mosfet issue.

You sure the error codes were cleared by doing a read before starting up?

Just seen pics. Any ideas why this happened??

[trb1]

Oooooo yeah baby. Welcome to rod bearing hell

[Jackson54]

Originally Posted by Steve Sas

Don't think MSD81 was affect by the mosfet issue.

You sure the error codes were cleared by doing a read before starting up?

Just seen pics. Any ideas why this happened??

Yes, MHD and my individual scanner both read codes cleared before I started engine again. As to why this happened, I wish I knew time to pull it

[Steve Sas]

apparently this is rare they say??

[Jackson54]

Originally Posted by Steve Sas

apparently this is rare they say??

Has been becoming less and less rare as time goes on naturally. Seen a few cases locally and somewhat locally to me and lots here on the forums. Oil was always changed at a 3k-3,500 hundred interval. Bought the car at 118K though car was owned by grandmother pretty much all of its life until the last month when a kid bought it for a month or so and then got a massive ticket and put it up for sale and then I found his listing lol. Car certainly wasn't risk free when I bought it so I can't be too upset but at the same time it sucks to be one of those rare cases.

[Steve Sas]

Seems like an aging issue like the M3.

[Tambohamilton]

Ouch. Sorry to see that!

Still seems weird to me that it would throw all those codes at the same time...?

[stewbets]

Originally Posted by Jackson54

Has been becoming less and less rare as time goes on naturally. Seen a few cases locally and somewhat locally to me and lots here on the forums. Oil was always changed at a 3k-3,500 hundred interval. Bought the car at 118K though car was owned by grandmother pretty much all of its life until the last month when a kid bought it for a month or so and then got a massive ticket and put it up for sale and then I found his listing lol. Car certainly wasn't risk free when I bought it so I can't be too upset but at the same time it sucks to be one of those rare cases.

Sorry, brother! I'm bummed for you! And now I'm getting a little scared. I changed my oil pan gasket before reading about the growing rod bearing problem and naturally that would have been a great time to change mine!

[Jackson54]

Originally Posted by stewbets

Sorry, brother! I'm bummed for you! And now I'm getting a little scared. I changed my oil pan gasket before reading about the growing rod bearing problem and naturally that would have been a great time to change mine!

Yes it is something I absolutely wish i had done whilst doing the oil pan gasket

[B6T]

Sorry to hear about your luck. I just lost a rod bearing on #5 but during a lapping session so I kinda deserved it.

You could look at it this way, at least you've got a rare spec M-Sport and not some worthless basic spec 335 that needed an engine like mine. So it's worth putting an engine into.

[oilcrankinject]

I will say with 100% confidence that you spun a bearing.

Pull the motor, take off the head, examine block. Bring to machine shop to get the parts worked. Reassemble with all kinds of new parts.

Same crap happened to me.