service vehicle light is stuck on no m.a.s
10-21-2007, 04:09 PM
#4
FormerVendor
10-21-2007, 11:13 PM
#6
Staging Lane
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Join Date: Sep 2005
Location: st paul mn
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10-22-2007, 01:50 AM
#7
this will get you in the general direction
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.
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.