It's difficult to know just how much you don't know until you know it. Reply #4 on: June 07, 2017, 06:30:43 PM ». I believe these are the fuel return lines. I know the 3/8" outlets on the sending units are the fuel lines that connect to the two 3/8" inlet ports on the selector switch. Fuellines_zps06376ac8%201_zps7elhiumx[1]. 1969 Chevelle Malibu Sport Coupe - EFI350, THM350. Are you converting to dual tanks and want to mimic the OE configuration? Family is not an important thing. 42 Locker (aka Rusty, aka Mater). The tank selector switch has 4 inlet and 2 outlet ports and there are two charcoal cannisters up front. News: Registration and Posting Agreement. 87 R10 Silverado Fleetside 355 MPFI 700R4 3.
So if I can I will make one, once I figure it out. Thanks for any help in this matter. The truck has dual tanks with 3 outlets out of each sending unit. Login with username, password and session length. Therefore I assume this connects to that port. The 1/4" outlets on the sending units go to the two 1/4" inlet ports on the switch. SMF © 2017, Simple Machines. I am looking for a fuel line diagram that shows from the sending units in the tanks to the selector valve for a dual tank set up on an 1987 R10. Re: Need fuel line diagram for dual tanks. 1991 V3500 - Gen V TBI 454, 4L80E, NP205, 14 bolt FF, D60, 8" Lift on 35s. Anyone know where I can find a diagram of the vent and fuel lines for a dual tank setup on a '79 K-10?
Fuel Systems and Drivability. 1968 Chevrolet Step-side Pickup - 300HP L6. In other words... if people learn by making mistakes, by now I should know just about everything!!! This is where I get alittle confused. There is the one remaining 1/4" out let from the switch and there is a vent line on the frame right in front of this port. This diagram of the fuel lines seems not to exist. There are the two remaining 5/16" outlets on the sending units. They go into the switching valve that is mounted inside the RH rail. When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes.
On: June 05, 2017, 09:31:11 PM ». The RH fuel tank just feeds directly into the switching valve with rubber fuel lines.
This is done via hardlines. One set of 3/8" and 5/16" lines go down the RH rail to the engine. The 1/4" vapor line goes into a tee under the switching valve and passes off to a hardline in the RH rail. Do these get connected together and head up to a cannister?
73-87 Chevy _ GMC Trucks. Topic: Need fuel line diagram for dual tanks (Read 26734 times). I understand that a fuel line diagram would be convenient, but what exactly do you need to know? 1977 K20 Silverado - 350, THM350, NP203, 14 bolt FF, D44, Stock Lift on 31s. 72 Blazer, 79 K-10, 78 Blazer, 97 Blazer, 97 Silverado.