If you think about it, if the EGR is blanked, it would be the same as if the EGR were constantly closed or not operated by the ECU
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If the ECU is looking for the MAF/MAP to alter during EGR operation (of which the software has supposedly been removed), then that software has not been modified successfully/properly. As it's still trying to confirm EGR operation by looking at it's effect on the relevant sensor.
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