Tuning
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Getting Started
Things you need
- KWP2000+ OBD cable
- KWP2000+ flashing software
- TunerPro
- XDF file for the revision of ECU you are using. If you wish to use a different version software than your car came with, read this carefully.
- XDF for M-box.
- ECUFix (optional, some kwp flashing software will do checksumming for you)
Fueling
- KRKTE - primary fueling
- KVB - fuel consumption (MPG in cluster)
- MLHFM - compensating for MAF housing diameter
- KFLDBTS - requested lambda for component protection when calculated EGT is above TABGBTS (may require a lower TABGBTS if your MAF is not 100% compensated for in MLHFM)
- LAMFA - requested lambda when calculated EGT is below TABGBTS
Boost
- KFMIRL - specified load
- FLKDHBN - maximum requested pressure ratio
- LDRXN - maximum specified load
- KFTARX - IAT correction for maximum specified load
Timing
- KFZW/KFZW2 - primary timing maps. ME7.1 has a two point variable cam timing system; there is a table for each cam timing state. When running elevated boost, you will have to significantly cut requested timing to prevent timing retard. Keep your worst case correction factors in the single digits, and always carefully monitor your knock voltages when tuning your timing.
Other niceties
Speed limiter
- VAVMX/VMAX - Speed limiter
Rev limiter
- NMAX - RPM limit
- NLLM - idle RPM
Left foot braking
Set either of these to maximum to prevent throttle cut when left foot braking:
- NWPMBBR - Minimum RPM for acc pedal value lockout on brake operation
- VWPMBBR - Minimum speed for acc pedal value lockout on brake operation
Knock control
Launch control
Emissions
- CDKAT - Cat diagnosis in OBDII-Mode. Set to zero to disable rear cat DTC