Airflow mass is the calculated airflow going through the engine based on the speed density system. One use is for the wg tables that are based on airflow mass and exhaust flow fraction (y factor). Can be useful for other things on a turbo upgrade if the air model and VE are corrected.
ETC angle. This shows what % the throttle blade is open. You can get throttle closures based on boost, tq, load, traction control, etc depending on how the car is tuned. So your pedal position can be 100% but the throttle may not be open. This helps track closures, and used with some of the enumeration PID's can point you to WHAT is closing the throttle.
IGN timing is just the final requested timing per cylinder after all compensations and corrections. IGN Correction is the amount of addition timing the ecu is adding to the base based on the knock sensor feedback.
Load is the actual load the engine is producing. Can be used if you have a load based tune, which some of us do, and is also used to track things like timing tables that are based on Load vs RPM.
STFT is how much fuel the ecu is adding and removing to reach the requested AFR target. +/- 5% is optimal, although some cars have a 10% spike at initial tip in. A lot of things affect this like temp, altitude, ethanol content, etc.
Spark Source will point you to which tables the ecu is currently using to command spark timing. MBT, BL, or possibly one of the ceilings.
TIP Act is the amount of pre throttle pressure (measure at the IC sensor) in psiA. This can help set your TIP max setting to help with overboost conditions before the manifold endures that pressure.
WGDC actual is the duty cycle % that controls your wg and boost pressure. This is the final % and many other PIDS go into tracking parameters to adjust and reach this number.
You can download a few pdf's from COBB that have all the monitor lists and tuning strategies. Very useful if you're interested in learning what this stuff means and what affect it has on the car. It's the FORD monitor list link.
COBB Tuning - Accessport
