The information below if from the EFI Live Tutorial section. It's a good plan to copy / paste the High Octane tables into the Low Octane tables when going MAFLess without "Boost".
dave w
Custom OS and 2/3 Bar Tutorial EFILive V7 Tuning
Tool
Going MAFless
When fitting a 2 or 3-bar MAP sensor you must disable the MAF sensor. It is possible to leave the
MAF sensor in place. This will need to be done on the 85mm MAF as the Intake Temp Sensor is located
in the MAF housing. Alternatively, you could relocate the IAT using on older style IAT sensor.
Even with the MAF still in place, the PCM must be forced to ignore the MAF signal.
To disable the MAF sensor:
Set the Engine Diagnostics->Engine Diagnostics->MAF->Parameters:
• {C2901} MAF High Frequency Fail 1: 1Hz
• {C2902} MAF High Frequency Fail 2: 1Hz
If calibration {C2902} is not available in the operating system that you are using, then ignore
this step.
• {C2903} MAF High Frequency Fail Limit: 1
• {C2907} MAF Test Min Engine Speed: 300 RPM
• {C2908} MAF Test Min Run Time: 0.1 seconds
Set the Engine Diagnostics->Engine DTC processing Enablers:
• P0101 ‘C’ Non Emissions
• P0102 ‘C’ Non Emissions
• P0103 ‘C’ Non Emissions
Set the Engine Diagnostics->Engine DTC MIL Enablers:
• P0101 ‘No MIL’
• P0102 ‘No MIL’
• P0103 ‘No MIL’
When going MAFless and/or boosted on vehicles with Electronic Throttle Control, you will most
likely need to increase {C6101} ETC Predicted Airflow, by significant amounts to stop the PCM going
into reduced power mode.
Set the
Transmission Diagnostics->Transmission DTC Fault Max Pressure Enablers
• P0101 ‘No’
• P0102 ‘No’
• P0103 ‘No’
Set the Transmission Diagnostics->Transmission Failsafe Enablers:
• Set all airflow related enablers to ‘No’ to prevent the transmission from going into failsafe
mode due to the MAF being disabled.
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