Rough idle and shutting off

Will78801 · 12-01-2024, 12:06 AM

I just fully rebuilt my 13 m5 motor. I am currently having a fueling issues. The start up is rough idle and shutting off and It keeps throwing codes of running to rich or lean and air fuel mixture. The codes it gives me is 102902, 118402 and 118502. I have currently replaced all hoses, wiring harness, sensors, hpfp/lpfp, Vanos and injectors/ coils twice. Everything is brand new and I'm stuck.

Here are current mods:
Csf intercoolers
Deka stg3 clutches
PG intakes
Kotte turbos
Catless DP
5150 autosport rods and pistons
ARP studs

I am currently stumped and now I am chasing codes.

KurtsM5 · 12-07-2024, 07:09 AM

What are the code descriptions? I'm not looking them up...

Will78801 · 12-08-2024, 02:13 PM

The code I receive now is a 118011 fault. It's a Mixture control, cross-bank: Fuel-air mixture too rich.

KurtsM5 · 12-09-2024, 02:28 AM

New MAFs?

KurtsM5 · 12-09-2024, 02:29 AM

Did it ever run right after all that work?

KurtsM5 · 12-09-2024, 03:32 AM

See post #29

https://forums.m3cutters.co.uk/threa....255177/page-2

Ghost_e90m3 · 12-11-2024, 08:32 PM

I have the same codes & im built motor too. My car misfires on idle and rough cold start. Car has shut off on me as well.

12-01-2024, 12:06 AM	#1
Will78801 New Member 8 Rep 26 Posts Drives: X3 M40i Join Date: Jun 2018 Location: Germany iTrader: (0)	Rough idle and shutting off I just fully rebuilt my 13 m5 motor. I am currently having a fueling issues. The start up is rough idle and shutting off and It keeps throwing codes of running to rich or lean and air fuel mixture. The codes it gives me is 102902, 118402 and 118502. I have currently replaced all hoses, wiring harness, sensors, hpfp/lpfp, Vanos and injectors/ coils twice. Everything is brand new and I'm stuck. Here are current mods: Csf intercoolers Deka stg3 clutches PG intakes Kotte turbos Catless DP 5150 autosport rods and pistons ARP studs I am currently stumped and now I am chasing codes.
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12-08-2024, 02:13 PM	#3
Will78801 New Member 8 Rep 26 Posts Drives: X3 M40i Join Date: Jun 2018 Location: Germany iTrader: (0)	The code I receive now is a 118011 fault. It's a Mixture control, cross-bank: Fuel-air mixture too rich.
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12-09-2024, 02:28 AM	#4
KurtsM5 Captain 909 Rep 740 Posts Drives: 2013 w/ DPs, BM3 stage 2 Join Date: Sep 2022 Location: Tampa Bay area Florida iTrader: (0) Garage List 2013 F10 M5 [8.80]	New MAFs?
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12-09-2024, 02:29 AM	#5
KurtsM5 Captain 909 Rep 740 Posts Drives: 2013 w/ DPs, BM3 stage 2 Join Date: Sep 2022 Location: Tampa Bay area Florida iTrader: (0) Garage List 2013 F10 M5 [8.80]	Did it ever run right after all that work?
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12-09-2024, 03:32 AM	#6
KurtsM5 Captain 909 Rep 740 Posts Drives: 2013 w/ DPs, BM3 stage 2 Join Date: Sep 2022 Location: Tampa Bay area Florida iTrader: (0) Garage List 2013 F10 M5 [8.80]	See post #29 https://forums.m3cutters.co.uk/threa....255177/page-2
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12-07-2024, 07:09 AM	#2
KurtsM5 Captain 909 Rep 740 Posts Drives: 2013 w/ DPs, BM3 stage 2 Join Date: Sep 2022 Location: Tampa Bay area Florida iTrader: (0) Garage List 2013 F10 M5 [8.80]	What are the code descriptions? I'm not looking them up...
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12-11-2024, 08:32 PM	#7
Ghost_e90m3 Private 50 Rep 66 Posts Drives: F10 M5 Join Date: Oct 2021 Location: Virginia iTrader: (0)	I have the same codes & im built motor too. My car misfires on idle and rough cold start. Car has shut off on me as well.
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