THE LARGEST BMW 2-SERIES FORUM ON THE PLANET
| 01-26-2022, 03:26 PM | #1 |
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M235i running lean
To anyone who may be able to help I have a 2015 M235i the car runs great
modifications done Intercooler downpipe charge pipe and MHD car is sitting around 90k. When the gas tank is full the car runs and drives very sluggish then when it gets to 25% it drives brand new almost like a new car with full power i've replaced tank vent hose complete assembly from BMW and no changes. turned off MHD nothing new or different has helped if anyone can offer some ideas would be greatly appreciated first time posting on the forum |
| 01-27-2022, 07:00 PM | #2 |
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Welcome! Good to see a decent mileage f22 here.
I don't know how a full fuel tank would lead to the car running lean or how those symptoms point towards a lean condition post some datalogs with a full vs quarter tank
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14' Alpine White M235i 6MT, BM3 Stg2+, VRSF DP-CP-FMIC, Dinan Muffler, GFB DV+, 3.5 bar MAP, Dorch Stg1 HPFP, NGK 97506, BM3 Flexfuel Kit, CDV delete, KW V3, EDC delete, Powerflex Camber LCA bushings, VMR 801 18x8.5/9.5 et45, Conti Extremecontact 235/265
Next step: M2 Competition or Manual Supra MKV build Summer 2022 |
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