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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N47 and N57 Turbodiesel Engine / Drivetrain / Exhaust Modifications > N47 Engine Surges
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      01-29-2020, 08:08 AM   #23
eugene89us
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Got the SOB to finally throw a code. Good thing me harassing the dealer resulted in them knowing me well, taking my car in and giving me a loaner without prenotification. Their Techs may be incompetent, but their service managers are great. Threw drive train malfunction, drive moderately error. Read with my Bluetooth OBDII, read 2 codes as below.

P049D EGR valve actuator and 273600. I think OBD app is reading code wrong, since it reads last as P2736, but when you search 273600 it actually brings up EGR also. Since I drove straight from when this happened to dealer, I could not verify with Ista myself. But at least I have a code, so maybe this is what led to my uneven idle. Now I hope it is not related to sooting, since I will probably have to force the dealer to walnut blast the intake. Any opinions on this (besides deleti g EGR of course when my warranty is up)?
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      02-18-2020, 12:34 PM   #24
andreigbs
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Is it possible the EGR cooler replacement recall work may need to be done?

As for turning off EGR: a tune would take care of that, no more dirtying up the engine's innards. Search for Kerma Tuning.
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      03-09-2020, 12:44 PM   #25
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I have also noticed my 2015 328D wagon doing this surge about 3 or 4 times in the last few months. The rpm needle only moves like a mm or so but is a constant up and down while waiting at a stoplight in drive.
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      03-10-2020, 02:07 PM   #26
eugene89us
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It sounds like all LCI N47T engines do this light surging at times, it has to be by design. Annoying, however, especially when you can also feel it. I could live with the sound as long as it idled well when it surges, but it doesn't always idle smoothly. I plan to get Kerma done, sounds like a very highly regarded tune. Waiting to knock a few things out maintenance-wise before I get to the fun part.
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