EGR and performance questions

jos51700 said
Agreed. EGR aids fuel mileage (lets the motor take in "burnt" air with no oxygen, so there's no leaning out, but still filling the cylinders). Properly functioning, the EGR closes at WOT so there's no impact on full-throttle performance.

This is correct. Google it. I used to be anti-EGR but now I leave it in place.

EGR is evil on diesels though.