Fuel system plumbing - The 1947 - Present Chevrolet & GMC Truck Message Board Network

C15_Sierra · 10-14-2011, 11:28 AM

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!

BR3W CITY · 10-14-2011, 01:38 PM

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).

clinebarger · 10-14-2011, 02:26 PM

The in-tank pump has a check valve built-in.

**TR65** · 10-14-2011, 09:12 PM

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

TR

C15_Sierra · 10-14-2011, 09:17 PM

Cool, much appreciated guys!

C15_Sierra · 10-16-2011, 12:59 AM

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?

10-14-2011, 11:28 AM	#1
C15_Sierra Registered User Join Date: Apr 2011 Location: Hartford CT Posts: 223	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! __________________ -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

10-14-2011, 01:38 PM	#2
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	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). __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

10-14-2011, 02:26 PM	#3
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: Fuel system plumbing The in-tank pump has a check valve built-in.

10-14-2011, 09:12 PM	#4
TR65 Senior Member Join Date: Nov 2007 Location: Greenville, SC Posts: 873	Re: Fuel system plumbing What Clinbarger says. My LS2 will hold full pressure for a couple of weeks normally. TR __________________ 1965 C10 SWB Fleet Two owner LS2 Swap Thread http://67-72chevytrucks.com/vboard/s...d.php?t=413880

10-14-2011, 09:17 PM	#5
C15_Sierra Registered User Join Date: Apr 2011 Location: Hartford CT Posts: 223	Re: Fuel system plumbing Cool, much appreciated guys! __________________ -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

10-16-2011, 12:59 AM	#6
C15_Sierra Registered User Join Date: Apr 2011 Location: Hartford CT Posts: 223	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? __________________ -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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