The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1973-1991 Dual fuel tank systems theory of operation

Moose Drool · 06-18-2021, 02:09 PM

I have an '84 GMC K1500 that has a carburetor, mechanical fuel pump and dual tanks. Aux. tank has been disconnected (reason unknown).The PO removed all items related to EFI and emissions. It has the Pollak 6 port selector valve (which will be replaced with a new one) and Standard DS-1807 switch. All wiring and connectors are there.

Would there be any reason not to reconnect the auxiliary tank and use the new valve and switch? I also plan on installing an adjustable fuel pressure regulator with a return line back to the valve.

Any help is greatly appreciated.

06-18-2021, 02:09 PM	#117
Moose Drool Registered User Join Date: Apr 2021 Location: Phoenix, OR Posts: 3	Re: 1973-1991 Dual fuel tank systems theory of operation I have an '84 GMC K1500 that has a carburetor, mechanical fuel pump and dual tanks. Aux. tank has been disconnected (reason unknown).The PO removed all items related to EFI and emissions. It has the Pollak 6 port selector valve (which will be replaced with a new one) and Standard DS-1807 switch. All wiring and connectors are there. Would there be any reason not to reconnect the auxiliary tank and use the new valve and switch? I also plan on installing an adjustable fuel pressure regulator with a return line back to the valve. Any help is greatly appreciated.