Egr Delete Question

Rusty67 said:

Good question. Removing EGR systems on these motors tends to make them run worse, lower HP/TQ and get worse gas mileage. If this is a simple swap to put in a new power plant you should leave it all intact.

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Yep, though the EGR system is shut off at idle and at WOT so its presence or absence shouldn't reduce maximum output.

But EGR reduces peak combustion temperatures and thus allows more spark advance at part throttle which increases efficiency. The PCM makes assumptions about EGR flow (which is basically inert gas occupying intake volume) and compensates things like fuel trims. If that flow isn't there and the PCM is not recalibrated those adjustments will constantly be at odds with the closed loop trims.

I dunno. Seems like kind of a pointless thing to delete.