eec egr scheme

[Craig Davidson]

EGR NATIC wrote:
> The EGR gasses are N2, CO2 and H2O with a smattering of other products
> (NOX, unburned HC, CO etc).  The primary effect of adding EGR is that
> these gases act as heat absorbers during compression and combustion -
> lowering the temperatures - thus lowering NOX and incidently, increasing
> the effective octane of the fuel.  They also, by absorbing heat, slow
> the combustion flame rate.

I now understand why the auto Scorpio w/ egr requires 87 octane and the 
5-speed with no egr requires 91.  The eec-iv on the Scorpio is MAP w/ an 
02 sensor.  If you can connect the 02 sensor and place the ecm in 
'learn' mode the ecm should be able to run the engine with no egr.

Craig