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thanks for reminding me about the problem with return lines, i forgot because my jeep only has a supply line no return cause the pressure regulator is on top of the pump at the tank and i hit 45-49 psi in the fuel line, so i should be able to add a fuel heater without any problems i think. the problem with having a return line for though's who don't now is that the fuel goes back to the tank at 180 degrees so that the tank hits 39 - 40 psi if the tank can't handle the pressure it leaks or worse case it blows, either way is bad because if the tank can more then handle the pressure you'll usually spring a air leak and loss fuel fast, if it can't handle the pressure it will probably do the same as before and leak like crazy anyway
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