Hi Goat hope your health is ok, as for your Patrol seems a common thing on some models ,
All I would suggest is fit an EGT Gauge and block your EGR off completely.And yes I got a startle
seeing this thread again, great to hear Nissan are doing the right this time. Your motor will be better off with the EGR block.
And hope you're up and at them soon ,,,,,,,,,,,,,,,,,,Cheers TD