Originally Posted by
N0DIH
Ok, if my understanding of EGR still holds (and I haven't studied for many years, so modern EGR may be operating differently), when EGR is enabled, timing is increased and AFR is decreased (leaner).
So, if I change what rpm EGR comes in at (say concentrate only on cruise rpm range I desire, say 1800 rpm to 2300 rpm), physically disable the EGR valve, and instead of INCREASING timing, decrease it slightly if needed, or just leave it zero degrees change, should force the AFR leaner (or does the nature of EGR flow make it leaner? I thought EGR was introducing inert gas) and potentially cruising slightly leaner.
Now, this is likely not emissions legal (unless your car doesn't come with EGR factory), but might be worth the evaluation...
Maybe like GM uses the Virtual Fuel Sensor, we can have Virtual Lean Cruise?
Ideas?