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01 7.3 No power when towing?
2001 F350 CCSB.
Recently when towing a LIGHT load (less than 3,000 lbs. on a 25' gooseneck) the truck has NO power. Does fine on flat terrain, but it wont even pull a minor grade without losing speed.
Noticed that the boost was WAY low (5 to 6 psi) even with my foot to the floor (still in top gear) when pulling up a minor hill on the freeway.
Replaced the up pipes and gaskets, and it made a difference, but only pulls the same hill at 7 to 9 psi.
Fuel pressure is running about 70 psi.
Checked the EBPV tube, no clogs.
Truck runs just fine without a load.