After reading so many posts on idle tuning, i'm still left cross eyed trying to figure out the logic behind this.
The idle rpm surges and sometimes dips too low and stalls out. Also, if I put the car in gear it will stall immediately. I now there is tons of posts on this matter but my question is a bit different as I've not seen this explained.
Why does the idle surge, and why does the car stall when put in gear. I'm trying to understand the mechanics of this. Is it too much fuel? Not enough fuel? Why does the car stall with too much or not enough fuel? Maybe the steps from cell to cell aren't smooth enough? Will a non-smooth curve cause the rough idle and stall?
I've increased and decreased the MAF up and down by as much as 12% in either direction but the car keeps stalling. It's colder than usual these days so not sure if that has anything to do with it. I just keep scaling numbers blindly hoping to hit a magic set of increases that works...but am frustrated and would prefer to have knowledge of what exactly is happening, so that maybe I can start again with a set of MAF figures at idle that have some intelligent selection to start with.
Long story short... what does an engine look for in an air fuel ratio/quantity in order to start and run properly? I'm assuming it's a balance based on stoich?
Thank you