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When driving the truck and its under a load my rail pressure will hold steady till about 22k at wot till about 3000rpm then it will drop to 17k for a split second then back to 22k at 3200rpm. It will do this if the edge is set to stock or if its on level 5. Truck drives fine other than thinking its the rail return valve but i wanted some other input befor i spend the money on the part.
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