[MHDBMW12]

I've posted once before but I haven't gotten a reply so, I'll give the whole story with what I've already tried once more before getting it towed to a shop.

Drove my car all day and at night as I'm going home I floor it at a light once its green. I turn and pull into a parking lot and realize the car is badly misfiring. The car ends up dying and shutting off. I start it and it struggles to start, however once it does the rpms almost drop low enough to shut off I tap the accelerator enough tot get home. Luckily I was close. CODES: 2D2E THORTTLE-VALVE ANGLE - INTAKE MANIFOLD VACCUM, CORRELATION. 29D2 MISFIRE CYLINDER 6.

I reset my throttle, through MHD and regular way as well. Reflashed the car back to stock.

THROTTLE code appeared, no throttle response extreme bouncing of RPMS 500-1500. Issue disappeared after disconnecting battery.
After a couple start-ups with misfires, the throttle codes seemed to have disappeared all I was left with was, 29D2 Misfire Cylinder 6, and eventually all cylinder combustion misfire. I replace spark plugs and coils with brand new OEM ones. NOTE: OLD Front spark plug threads covered in oil due to spill, however rears were dry.

I start the vehicle and I hear a weird loud sound, and feel misfires so I turn it off quickly. Same codes come back Cylinder 6 misfire, Throttle-valve angle.


BACKGROUND INFO ON CAR:
2009 N54 XDRIVE
153,000KM (94K?? miles)
Stage 1+ (DCI, OCC, FMIC, CP, BOV.)
INDEX 9 Original Leaking injectors
I believe original HPFP as well.

If anymore info is needed please ask. I hope these details may help any of you determine what could be going on or how I can move forward to diagnose.

[MHDBMW12]

Anyone?
I have inpa installed as well, however I don’t know how to use it well. I haven’t used it yet. Maybe diagnostics from that would help?

[335i54n]

I would verify no vac leak and mechanical (compression) is good. then swap injectors (i would replace them anyways).

[Wolf 335]

Injector 6 getting stuck open.

Replace injector.

As a matter of fact replace all of those garbage index 9s.

[MHDBMW12]

Originally Posted by Wolf 335

Injector 6 getting stuck open.

Replace injector.

As a matter of fact replace all of those garbage index 9s.

Yeah I was trying to go as long as possible without spending 4k+ for new ones I guess I have to now I’ll compression test and then I’ll replace them thanks for the response.

[MHDBMW12]

Originally Posted by 335i54n

I would verify no vac leak and mechanical (compression) is good. then swap injectors (i would replace them anyways).

Thanks I have already checked vacuum I’ll get a compression kit and check. These index 9’s were gonna go soon enough anyways.

[335i54n]

you can do used 12's and have them cleaned and regenerated. not a common failure but you can also pop the tb cover and inspect the gears.

[MHDBMW12]

Originally Posted by 335i54n

you can do used 12's and have them cleaned and regenerated. not a common failure but you can also pop the tb cover and inspect the gears.

Sure I’ll check that as well. Thanks so much. I know eBay’s not a good source for used index 12’s, anywhere else I could get them ? I’m working on Facebook marketplace and Kijiji nothing in my area. I might try FB marketplace in other places and see if anyone is willing to ship.

[Serf27]

Why not replace the single cyl6 injector if compression is good?

[Wolf 335]

Originally Posted by Serf27

Why not replace the single cyl6 injector if compression is good?

I think he mentioned that all of his injectors are leaking.

[MHDBMW12]

Originally Posted by Wolf 335

I think he mentioned that all of his injectors are leaking.

Yes they are I’ve been planning to replace them all anyways.