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Old 09-23-2018, 12:03 PM   #36
gmachinz
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Join Date: Jun 2011
Location: Des Moines, IA.
Posts: 4,143
Re: 1973-1991 Dual fuel tank systems theory of operation

If you are going with EFI, you have the right switch. You need a constant switch (not momentary) because the switch also runs the fuel pump relay. On my conversion kits I ise a LH and RH relay for the fuel pumps and they also control the LH/RH shuttle valving inside the frame mounted selector valve.
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