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Old 10-14-2011, 11:28 AM   #1
C15_Sierra
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Fuel system plumbing

I'm curious...do I need to install a 1-way check valve on the pressure (feed) side of the fuel rail? I'm not sure how much would readily fall back into the tank (I'm using an in-tank pump)

Is it more of a convenience or a necessity?

Thanks!
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Old 10-14-2011, 01:38 PM   #2
BR3W CITY
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Re: Fuel system plumbing

just seems like one more thing that can leak, clog, or fail. If my truck sits for a WHILE, I might have to key on for 2-3 seconds before cranking; however I do that anyway to hear the dbw throttle body cycle (just a habit, since i used to have problems with it).
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Old 10-14-2011, 02:26 PM   #3
clinebarger
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Re: Fuel system plumbing

The in-tank pump has a check valve built-in.
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Old 10-14-2011, 09:12 PM   #4
TR65
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Re: Fuel system plumbing

What Clinbarger says. My LS2 will hold full pressure for a couple of weeks normally.

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Old 10-14-2011, 09:17 PM   #5
C15_Sierra
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Re: Fuel system plumbing

Cool, much appreciated guys!
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-Steve

1980 GMC C15 Sierra LWB
Dark Carmine Red/Carmine Int
Was: 250/3spd (1980-88), then a 305/TH350 (1988-2011)
Now: 5.3/4L60E, 2.73 12-bolt open rear
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Old 10-16-2011, 12:59 AM   #6
C15_Sierra
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Re: Fuel system plumbing

OK another question -

What did you guys use for plumbing the fuel lines to the sender? Do the fuel rail quick connects work on the sender as well?
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1980 GMC C15 Sierra LWB
Dark Carmine Red/Carmine Int
Was: 250/3spd (1980-88), then a 305/TH350 (1988-2011)
Now: 5.3/4L60E, 2.73 12-bolt open rear
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