Originally Posted by
redhardsupra
Here's a longer list of PIDs, could someone please enlighten me as to which ones do exactly what, what platforms they occur on, etc... I have an idea about most of them, but i'd like to hear others' take on some of them.
GM.DYNAIRTMP_DMA - I would guess this is the IAT used at a given instant during SD calculations????
GM.CHRGTEMP_DMA - Calculated charge temperature based on IAT, ECT, Charge Temp Blending, and Charge Temp Filter.
GM.DYNCYLAIR - The PCM's predicted airflow values...maybe based on changes observed in short-term histories and observed/filtered changes? In other words, I believe this pid is designed around transitional throttle.
GM.DYNCYLAIR_DMA - The current grams/cyl. value being used in SD fueling calculations. If the MAF is active, GM.CYLAIR_DMA is the pid to use.
CALC.CYLAIR - EFI Live's calculated grams/cyl. based on MAF flow and RPM.
GM.DYNAIR - The PCM's calculated grams/sec. of airflow based on VE settings, IAT, ECT, etc.
GM.DYNAIR_LS2 - Same as above, but for LS2's.
GM.AIRPERSEC - Must be new for 7.4.x as I don't see it in my list on the last build of 7.3.x.
GM.VETABLE_DMA - The current VE table value (direct lookup) being used for fueling calculations.
CALC.VEPCT_V8 - EFI Live's calculated VE % of theoretical maximum based on the above pid and engine displacement.
GM.APCYL_E40_DMA - Must be new for 7.4.x as I don't see it in my list on the last build of 7.3.x.
CALC_VE - EFI Live's calculated % of theoretical maximum based on MAF flow, IAT, displacement, RPM, and MAP.
GM.AIRFLZONE_DMA - Maybe has to do with operating range of the IAC??
GM.ENGZONE1_DMA - Must be new for 7.4.x as I don't see it in my list on the last build of 7.3.x.
GM.CORRRCALC - Must be new for 7.4.x as I don't see it in my list on the last build of 7.3.x.
GM.INJFLOW - PCM's calculated injector flow rate based on current conditions (flow vs. MAP)???
GM.FINLRCALC - Must be new for 7.4.x as I don't see it in my list on the last build of 7.3.x.