tuning ltft's.. changes dont do anything?
tuning ltft's.. changes dont do anything? just started trying to tune w/ hptuners after tr224 cam install. using the ls2tuninginfo.doc file..
A. In the VCM Editor>Edit>Engine Diagnostics>General>MAF Sensor Fail Frequency = 0. This will set a P0103 code and turn on the SES light. Ensure that the P0103 DTC is enabled and you are seeing P0103 in the DTC list. Don’t worry about the DTC at this time.
B. In the VCM Editor>Edit>Engine>Spark Advance>Main Spark vs. Airflow vs. RPM Open Throttle/Moving. Copy the High Octane table to the Low Octane table. The computer reverts to the low octane table when a MAF failure is indicated, this will assure optimal timing.
C. Start the VCM scanner>Histogram display. File>Connect. Then Tools>VCM Controls>Fuel & Spark>Fuel Trim Learn>Reset Fuel Trims.
the block of ltft values below 2400 rpm's and 55 kpa are all at -12. i have now subtracted 14 (in 2 separate steps) from the primary PE/RPM/MAP table and i am still getting -12 for that same block of values. am i missing something? my other LTFT values above this range are all between 0 and about -6 or so.
thanks in advance..
A. In the VCM Editor>Edit>Engine Diagnostics>General>MAF Sensor Fail Frequency = 0. This will set a P0103 code and turn on the SES light. Ensure that the P0103 DTC is enabled and you are seeing P0103 in the DTC list. Don’t worry about the DTC at this time.
B. In the VCM Editor>Edit>Engine>Spark Advance>Main Spark vs. Airflow vs. RPM Open Throttle/Moving. Copy the High Octane table to the Low Octane table. The computer reverts to the low octane table when a MAF failure is indicated, this will assure optimal timing.
C. Start the VCM scanner>Histogram display. File>Connect. Then Tools>VCM Controls>Fuel & Spark>Fuel Trim Learn>Reset Fuel Trims.
the block of ltft values below 2400 rpm's and 55 kpa are all at -12. i have now subtracted 14 (in 2 separate steps) from the primary PE/RPM/MAP table and i am still getting -12 for that same block of values. am i missing something? my other LTFT values above this range are all between 0 and about -6 or so.
thanks in advance..
