Curing Vapor Lock

That's right, no more vapor lock. With summer in full swing and vapor lock becoming a major problem, we have found the cure. Dual Fuel Pumps. Manual with a back-up Electric.

There are two methods for mounting. The farther back by the fuel tank is better, but there are other locations for mounting, that will save you time. It is up to you to determine which is better for you.

Auxiliary Electric Pump Installation (longer, better method)

1. loosen but do drop your fuel tank
2. remove the fuel line hold downs along the inside of your frame rails.
3. these first two moves allow you to install an electric fuel pump just behind the boxed section of the frame, inside the channel part of the frame. This place is ideal as it is protected, cool, and easy to plumb and wire...if your metal lines are free of the confines of step two... impossible otherwise. Do not cut any lines yet.
4. replace your in tank sock (dealer part) have before you start all This Depending on year you may have to completely remove your tank (78 earlier) or remove all your carpet, rear seat etc. and remove the access panel over the pickup assembly for tank (wagons w/plastic tanks). wash off top of tank with high pressure water there will be dirt surrounding the top of pickup.cut hose clamps to remove them (have new ones before you start at least six plus several feet of fuel line. Pickup on plastic tanks can be removed by using a large screw driver against one face of the plastic nut and "gently" tapping to loosen. Metal tanks require a BRASS punch to avoid sparks, to loosen them. Remove pick-up assembly make a mental note which way you ease it out.
5. cut clamp for old sock, Remove old sock and using compressed air blow out line. Slip new sock on, new socks Do not need a clamp unless they come with one. Carefully reinstall Pickup into tank. The new sock will probably press against The bottom, and offer some resistance as you try to push it down. This is okay push far enough to get The nut started then re-tighten as you loosened it. Do not skip next steps.
6. Remove intake line (tank side) from all fuel pumps and blow all lines out with compressed air.
7. install new rubber lines from tank pick-up to frame line. I install an in line filter at This time in This location in order to save The electric pump just down stream.
8. now your ready to install The electric pump without getting covered by gas when you cut The line. prefit The fuel pump you will need longer lines than come with it. The fuel line is The largest line. Cut The line using a "low clearance" tubing cutter. Drill holes for fuel pump and proceed with The install. Fuel line from The tank may be bent slightly. Pre-solder and heat shrink enough wire for The job prior to climbing under The truck. (Throw The crimp piece away along with The wire clamps that came with The pump). finish install of pump with screw type hose clamps. Wire pump through an ignition switched source, then through a lighted panel switch. (An oil pressure switch in line is a very good idea as This will kill The pump in The event of a roll over or serious accident)
9. install a new mechanical pump along with all new lines and filter at engine end.
10. Reinstall all line clamps along frame.
11. reinstall gas tank, check for binding of Fuel lines.
12. Turn ignition switch to on but Do not start, Turn Fuel pump on, you should hear The distinct sound of The Fuel pump working. Get out and check for leaks.
13. Start your vehicle and have thousands of miles of care free driving. Your Fuel delivery system has just been overhauled front to back and upgraded with duel filters and duel pumps.
14. a few other points to cover: replace Your gas cap at This time, and make sure Your tank vent is clear. I run a Fuel filter without a return line, but have not had problems with one as long as The rest of these items have been done. The electric I use is The "solid state " stocked by NAPA. Fuel filters save Your pumps as much as Your carbs, Get one upstream of everything.
15. I have run duel pumps for years without problems, by switching off Your electric from time to time you make sure Your mechanical is working, and you can always listen for Your electric to make sure it is working. Electric pumps generally help greatly with "slow starting vehicles".

(Quick method location)

Auxiliary Electric Pump Installation (quick method)

1. mount Fuel pump in desired location. The instructions for mine required a 45 degree angle so I mounted mine on The frame right below The gas pedal.
2. Cut Fuel lines with a pipe cutter. Be sure to take it slow and you will not create a spark. Be sure to leave enough room to accommodate spacing for looped rubber lines.
3. Install rubber hoses from The Fuel line to The pump. Use hose clamps to attach The rubber hoses to The Fuel lines. Loop The hoses to avoid kinks.
4. Install an electric switch. I mounted mine just to The left of The steering column. Run wires up through The firewall and into a "hot" source.

That's it. I Do not Turn on my Electric, but use it as back-up. If The manual pump goes out, or I vapor lock, flip The switch, and off and running again.