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Have a 2003 Ford F-250 Super Duty with a 5.4 Lt. Triton. Has 267 K Miles.
Losing Power when driven 2 hrs straight. When You floor it, it boggs out. I pull over and kill it, and then its like new again. A/c was off and wasn't towing anything. Whats so odd is you pull over and turn it off, then have full power, I get back on road and acts normal for several miles. Usually around 5 miles it loses power again. Codes are "System to lean Bank 1 EGR Flow Insufficient Detected, System to lean bank 2