Originally Posted by
rich24v
Looking through some of the engine data displays the other day, I noticed that at hot idle
AFR sits at ~13.7 which I thought was a bit weird as stoich for petrol is 14.7
I pulled a couple of tunes from the repository to see what the calibration sets it at and
was surprised to see 0.0722 (13.85 afr) so engine is doing what it's told.
So question is why 13.85afr and not 14.7 afr ?
What's the implications for a emmissions test in a couple of years ?
(btw the na 6.4L calibrations calls for 14.53afr)