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Old 01-05-2020, 04:01 PM   #11
hatzie
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Join Date: Oct 2008
Location: Wentworth, NH
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Re: 1973-1991 Dual fuel tank systems theory of operation

As long as you aren't exceeding the pressure capacity of the valve I don't see a problem with it.
Use high volume low pressure lift pumps in the tanks to feed one frame mounted high pressure pump.
The lift pumps will keep the high pressure pump from starving and the return pressure should be low enough that the 65PSI valve will handle it.
Several Japanese and European cars are designed that way.
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RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
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