ETC cars and IAC parameters
It is obvious that GM utilizes the same PCM and OS's for both ETC and non-ETC cars. Why are there so many tables in the ETC cars that reference to IAC control? What is GM thinking about by still referring to an IAC that doesn't exist?
These are the tables that I would like to know there interaction, if any to a ETC's control;
IAC Effective area {4403}
Airflow Parked {4308}
Default IAC Motor Park Position {4401}
Maximum IAC steps {4402}
Anyone have any insight to the PCMS calculation process with these?
Thanks
Howard
Thanks for posting Howard.....
Thanks for posting this Howard.... I've got an LS1 ETC car giving me a hard time idling...As soon as I fix one problem, I develop another.....
I'm not sure why idle control isn't (and wasn't designed) to be much simpler....
See what happens when you let engineers design things for the real world???:bash:
Anyway, it's usually not difficult like this car...but....It's hurting me....
Is there a way to limit the closing of the throttle kinda like the stop screw on a carb or t-body.....
The car idles great....but, For some reason, the throttle is permitting the idle to drop past the set point of 800 down to 4 or 5 hundred after opening the throttle.....It stumbles and then returns.... I've fixed this 1000 times before, but this thing won't cooperate.
any ideas....??? I've messed with EVERYTHING....and like Howard says,...There's a bunch of stuff labled IAC so how do we know if IAC applies to ETC or NOT....or when each is used by the o/s???
Anyone have any thoughts?
Chuck CoW