Little HELP...fuel pump ?

[low dawg]

Hey guys, I need a chunck of info from y'all...I am working on plumbing my fuel delivery system (back to front) and lo and behold once I got to the mechanical fuel pump on my '82 2.8L Chevy motor I found that there is a fuel return line...Larger 3/8" line into pump from tank, steel formed line out to carb.(never disconnected this one), and then a smaller 5/16" line that I assumed was the return to the tank...BIG QUESTION IS...does that return line need to get back to the tank...or is more like a vent for the pump and there will be NO fuel traveling thru it??? Thanks guys!!!

 

[sgtpontiac]

Could be either a return line or a vapor cannister line

Hey guys, I need a chunck of info from y'all...I am working on plumbing my fuel delivery system (back to front) and lo and behold once I got to the mechanical fuel pump on my '82 2.8L Chevy motor I found that there is a fuel return line...Larger 3/8" line into pump from tank, steel formed line out to carb.(never disconnected this one), and then a smaller 5/16" line that I assumed was the return to the tank...BIG QUESTION IS...does that return line need to get back to the tank...or is more like a vent for the pump and there will be NO fuel traveling thru it??? Thanks guys!!!

On the 82 2.8 didn't it use the varijet carb...kinda looks like a weber? The smaller line is probably the carbon canister / vapor cannister line.... but, if it's a return line it would be there to eliminate vapor lock but either way, you can eliminate it.....

 

[low dawg]

Sgt., yeah it is the varijet carb...I got that all figured out (I think LOL). There were 2 lines in the frame originally...3/8" that I know was the supply line to the fuel pump, but like I said, when hooking that line up I discovered and smaller line 5/16" going into the frame right next to the supply line, initially I thought return, anti-vapor lock, because I didnt remember a vented cap on the stock tank. I gues I'll put a plug in it for now and see what happens...As a side note, I am using a vented fuel cap on the new set up...Thanks a ton for your help.

 

[sgtpontiac]

I was still turning wrenches at the GM store

back when your 82 was built....so I remember bits and pieces of it....LOL...
You won't have any issues with capping that off....and with the vented cap you should be good to go...glad I could help....