I have searched until my head hurts and clicked on every tab I can find in the Editor and after 12 hours I'm losing the will to live.
What I have, and what I'd like to do:-
Engine: LS3 crate motor.
VCM and harness and sensors all GM for this crate motor.
In the Uk we have to meet the following emission limits:-
Idle;
CO........0.30 max
Fast idle (2500-3000rpm)
CO........0.20 max
HC........200 max
Lambda....... 0.97 to 1.03
currently the idle is fine.
The fast idle is where the problem is.
between 2500 and 3000 rpm the lambda struggles to get higher than 0.97 which pushes the CO to 1.14+
If I rev the engine to 3200rpm the lambda suddenly jumps to 1.00 and the CO clears up nicely. But 3200rpm is too high for our authorities.
I was hoping to be able to pull up some tables (AF or VE etc) and drag around some cells and sort it out but I can't find anything like this to work with.
And being a novice I don't know what else i dare play around with to get the figures I need.
I'm sure this is really simple to somebody but sadly at this stage it isn't me.
Ireally want to get my head around how to sort this GM VCM as I have made it my personal mission, even though as a business it would be cheaper to go aftermarket at this rate.
Thanks for reading,
Simpleton terms in reply please.