Fuel Econ and Hiway Mode

[Bruce Plecan]

That's the Hollywood version,
what they actually do, is add timing, and fuel since the EGR's mixture
*reacts* so poorly.
Lots more in the archives about EGR
Bruce




From: "Dave & Irina Eicher" <sailors at mwci.net>
> My understanding about EGR is: EG is fed back into the intake charge
> reducing the O2 in the cylinder. If the fuel is cut back appropriately to
> maintain the correct AFR, the effect is like reducing the displacement of
> the engine. Properly done, I'm told EGR does improve economy for this
> reason. Does anyone have a different understanding? thanks, dave
>
> Dave Eicher



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