lplott
September 29th, 2005, 07:27 AM
Seems to be a conflict between the Custom OS and 2/3 Bar Tutorial and AutoVE Tutorial:
Custom OS under Going MAFless:
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 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’
AutoVE say:
12. Open calibration {C6002} " Engine DTC MIL Enablers" Set P0101, P0102, and P0103 to No MIL.
13. Open calibration {C2901} “MAF High Frequency Fail 1" Set it to 0
14. Open calibration {C2902} “MAF High Frequency Fail 2" Set it to 0
15. Open calibration {C2903} “MAF High Frequency Fail Limit" Set it to 1
16. Pop the hood and unplug the MAF sensor (see note)
Note: If your MAF has a 5-pin plug, your IAT sensor is built into the MAF. You will need to make provisions to get the IAT signal into the PCM. Various write-up’s on this can be found at: www.efilive.com and www.ls1tech.com
Problem 1: {C2902} title does not agree between the two tutorials. Which is correct?
Problem 2: Is step 15 {C2903} in AutoVE Tutorial correct or the {C2902} step in Custom OS?
I tend to believe the Custom OS for a boosted application. Make those settings, leave the MAF in place, and skip the AutoVE steps 12-16.
Also, do not perform AutoVE Tutorial "Return the PCM to Closed Loop, Speed Density" or "Verification" for boosted applications running the Custom 2/3 Bar OS.
Is this correct?
Lonnie
Custom OS under Going MAFless:
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 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’
AutoVE say:
12. Open calibration {C6002} " Engine DTC MIL Enablers" Set P0101, P0102, and P0103 to No MIL.
13. Open calibration {C2901} “MAF High Frequency Fail 1" Set it to 0
14. Open calibration {C2902} “MAF High Frequency Fail 2" Set it to 0
15. Open calibration {C2903} “MAF High Frequency Fail Limit" Set it to 1
16. Pop the hood and unplug the MAF sensor (see note)
Note: If your MAF has a 5-pin plug, your IAT sensor is built into the MAF. You will need to make provisions to get the IAT signal into the PCM. Various write-up’s on this can be found at: www.efilive.com and www.ls1tech.com
Problem 1: {C2902} title does not agree between the two tutorials. Which is correct?
Problem 2: Is step 15 {C2903} in AutoVE Tutorial correct or the {C2902} step in Custom OS?
I tend to believe the Custom OS for a boosted application. Make those settings, leave the MAF in place, and skip the AutoVE steps 12-16.
Also, do not perform AutoVE Tutorial "Return the PCM to Closed Loop, Speed Density" or "Verification" for boosted applications running the Custom 2/3 Bar OS.
Is this correct?
Lonnie