ArdWrknTrk Posted February 14, 2023 Share Posted February 14, 2023 On my 1981 there is no 90 degree fitting and the hoses are just hooked up to the valve with hose clamps. So a reversal of the hoses is extremely easy. The 1983 should be identical if not very similar. Things did change with the in-tank fuel pump, but the 1983 with 302 should still be mechanical fuel pump only. (From the Factory anyway. ) Good to know! I'm afraid I don't have anything to go by except the examples in the EVTM's here on the site (unfortunately there is no '82-'83-'84) so your experience is invaluable, Ralph. Link to comment Share on other sites More sharing options...
Michael Cesaro Posted February 14, 2023 Author Share Posted February 14, 2023 Is this a "3" port selector valve type, located on the frame? With one electrical wire going to it. If so the rear tank is the default tank and the front tank is the secondary. With no power at the selector valve it should default to the rear tank. If it isn't then you may have the hoses reversed at the valve. Even if the hoses are reversed it should still work in theory though right. Just pulling from the wrong tank? Right now it pulls gas from the front when it’s selected but pulls nothing when it’s set to rear Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted February 14, 2023 Share Posted February 14, 2023 Even if the hoses are reversed it should still work in theory though right. Just pulling from the wrong tank? Right now it pulls gas from the front when it’s selected but pulls nothing when it’s set to rear Yes, but the senders are controlled by the switch so you would be reading the opposite tank. Perhaps you should check the line between rear tank and valve. If there's a crack or hole there the pump couldn't pull fuel. Link to comment Share on other sites More sharing options...
81-F150-Explorer Posted February 14, 2023 Share Posted February 14, 2023 Even if the hoses are reversed it should still work in theory though right. Just pulling from the wrong tank? Right now it pulls gas from the front when it’s selected but pulls nothing when it’s set to rear Yes, it should work backwards, but as Ardwrkntrk states, you wouldn't see the fuel drop on the fuel gauges, when on the correct tank by the switch. If the selector valve is defective, and hooked up backwards, it will default to the front tank. It will not pull anything from the rear tank no matter how the selector switch is switched. If Fuel will not pull from either tank, (from the Front and Rear Tank) when the selector valve is in the rear "position": 1: Temporarily hook the selector valve up backwards. If symptoms switch to the opposite tank, replace the selector valve. 2: If the fuel still will not pull from the rear tank, then follow Ardwrkntrk's advice and see if there is a hole in the fuel line between the tank and the selector valve, including the fuel sender. I've seen the sump of the fuel senders spring a leak, and would only pull fuel above half a tank before. I've also seen the fuel lines plugged as well. The filter sock at the end of the sender for instance. One of these suggestions should get you working again. Link to comment Share on other sites More sharing options...
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