Holley Sniper EFI sending unit. Fuel lines. Model # 12-333

[ArizonaK5]

Finally getting back on track with my 76 K5. After spending money on going back stock with the stock Q-Jet factory set up. I ended up buying a complete Holley Q-Jet Sniper EFI system. One question I have at this time is the EFI in gas tank sending unit. There are 4 ports to plumb into 1 is the fuel feed, 1 is the fuel return. The next two lines are in question. The largest line looks to be 1/2" in size and is open on both ends. Does that go to the filler neck line? The smallest line 1/4" with a bell looking thing at the end, go to the vapor canister line that is mounted on the driver side fender area. If so, does a line go from the canister to the sniper unit. What port on the sniper? Kinda like the factory did it? I already called Holley twice and the paperwork isn't much help.

 

[Wes Harden]

The 1/2" line at the tank is to the filler neck.
Was this a factory tbi sending unit?
If so the 2 lines with tube nut and o ring. Larger is delivery.
The vent/vapor line is low pressure, simple push on and hose clamp will do.

 

[sweetk30]

Should of searched sniper . . . Not the best unit at all .

And could of just used a stock blazer efi tank sender and ep381 pump for a lot less money .

 

[ArizonaK5]

Thank you, guys. I already have the Holley 12-333 sending unit. Isn't a factory tbi sending unit. The Holley sender looks just like the factory sending unit. So, the vent/vapor line would go to the Vapor canister? From vapor canister to the Sniper EFI or just to canister.

 

[Wes Harden]

Tank to canister, then to sniper unit. Usually metered in some way. Ported vacuum.

 

[ArizonaK5]

That's what I thought. Installed all of the new fuel lines yesterday. Gas tank today?