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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications > [HELP] B48 Running rough, rich mixture..
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      09-11-2023, 03:42 AM   #1
vaprusek
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Drives: BMW 430i GC Stage 2+ (330 HP)
Join Date: Jan 2022
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[HELP] B48 Running rough, rich mixture..

Hi,

I have a 2016 BMW 430i GC, it has around 98,000 km and is currently BM3 Stage 2 with a sports-cat, 435i exhaust, aluminum chargepipe+inlet and NGK sparkplugs. I only use 100RON fuel (US 93oct). I change oil (5W-30 Castrol M) every 8k km and sparkplugs every 2nd oil change.

The car has been running pretty rough for the past few weeks, on cold start the idle hesitates a lot and sometimes the car even stalls. I let the car idle for 30s before going into gear, however, it drops revs like crazy when I select Drive/Reverse. I have also noticed that the tailpipes are quite black..

I have included a WOT log below and also the error codes I got today along with a CEL.. I am suspecting a leaky injector or failing HPFP? I appreciate any input. Thanks!

Log: https://bootmod3.net/log?id=64e7d9a1...EJ87mganiL6bxg

Codes:
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330i, 430i, b46, b48, bm3, fuel mixture, rich, rough idle, tuned


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