No signs of leakage anywhere. Blocked off egr results in DTC's p0401 and p0404 while only disconnecting the egr connector I get p0401 and p0405. Boost limits to 20psi either way.
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2004 F-350 XLT 6.0 Diesel 4X4 04/04 Build
PHP FICM & Rolled Back ECM/TCM 
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