bushwacker, what a great post. Thank you. after over thinking this i have come to the hypothesis that when i lower the trailer onto the truck that the fwd end of the tank is lower than the back end. this would cause the vent to collect fuel before the sender sees the same amount. my vent is on the fwd 1/4 of the tank the fill is aft of that by about a foot or so and the sender is 11 inches fwd of the aft end of the tank. i may be able to solve this by just getting a 4 inch raised hitch vice the 1 1/2 inch i have now. i have the wema brand sender and it works fine when i pulled it yesterday. i'll fill it today and try to monitor cruising RPMs and distance traveled when i head out tomorrow. i still think i'm buring to much fuel. i am terible with mechanical stuff so what are some quick easy things to imporove fuel burn, ie, plugs, timing, etc... i will definetly do that gauge cal you talked about later as well. thanks guys.
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