Disabling the EGR is illegal and can get you in biggggg trouble! You need to ensure that the single vacuum line going to the EGR valve is connected and not blocked with a screw or bb. The computer on the 350 has no way if knowing if the EGR is working. so it's your job to be sure it is.

-Jason

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.