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If the EGR is stuck open, a tune is not going to magically fix it.
If you delete the EGR, you will need to remove or block the cooler flow to the intake elbow, since there will still be uncommanded EGR flow with the valve hung open.
At the very least, you'll have to remove the valve (probably won't come out of the housing) and smash it shut.
Hope this helps
Ford Senior Diesel Technician
2008 F-350 4x4 Off Road 6.4 Powerstroke Diesel
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