Electric Fuel Pump
Installation Instructions
FOR TR-6
PART # 377-062
440 Rutherford St. P.O. Box 847 Goleta, CA 93117
1-800-667-7872 • FAX 805-692-2525 • www.mossmotors.com
Tools required: 1/4” socket 1/4" drive, 7/16”
socket, 11/32”, 1/2", and 12mm combination
wrenches, 1/4” nut driver, two pairs of needle
nose vise grips, wire cutters, wire crimpers, a
drill, 17/64” and #30 drill bits, phillips and flat
blade screwdrivers, hammer, center punch, a
tri-square, and a test light.
Read and understand these instructions
completely before starting the installation.
During this installation you will be working
around fuel. Work in a well ventilated area
and make sure you are not near any source
of ignition.
Illustration 1
This installation is best performed when the
gas tank is nearly empty.
1. Disconnect the negative battery cable. Lift
up the car and place it on four jack stands.
Never work on your car while it is sitting on
the jack.
2. Open the trunk and remove it’s contents,
including the spare tire.
3. On the left (drivers) side of the trunk,
locate the flat space between the 2nd and
3rd reinforcing ribs. Measure back from the
2nd rib 2 1/4" and draw a pencil line down
from the top edge using a tri-square.
Measure down along that line and make a
mark at 2” and 3”. These are the drill
locations to mount the new pump. Use a
hammer and a center punch to mark the
locations for drilling. Start with the #30 drill
and then drill the holes out to 17/64”.
Illustration 1
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Electric Fuel Pump Installation Instructions
Illustration 3
4. Once the holes are drilled, locate the lower
hole on the outside of the trunk. Scrape a
small area around the lower hole through the
undercoat to bare metal. This is where the
ground wire will make contact. Illustration 2
6. Locate the 154” long red wire. Cut 14” of
wire off of the end and strip 1/4" of insulation
off the ends of both wires. On the long piece,
crimp on one female spade connector and
one small ring connector. The short piece will
be connected to the inline fuse holder using
an inline crimp connector. After crimping,
shrink the heat shrink tubing that covers the
inline connector by applying heat. Crimp
female spades onto both ends of this
assembly. Install the 5 amp fuse into the fuse
holder. Illustration 4
Illustration 2
Illustration 4
7. Now, strip 1/4" of insulation off each end of
the 27” yellow wire. Crimp a female spade
connector onto each end. Illustration 5
5. Now, cut the wires to length and crimp the
ends on. Locate the two short black wires.
The 5” long piece is small in diameter and
the 3” long piece is larger in diameter. Strip
1/4" of insulation off the ends of both wires.
On both ends of the 3” long wire, crimp a
large uninsulated ring connector. On the 5”
long wire, crimp one large ring connector and
one female spade connector. Illustration 3
Illustration 5
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Revised 1/06
Electric Fuel Pump Installation Instructions
9. Back on the outside of the trunk, slip one end
of the 3” black wire over the lower bolt. The
under coat should be scraped through around
this bolt. Now, slip on the second rubber pad
and the square plate. Slip the free end of the
black wire over the lower bolt. Illustration 7
8. Next, locate the two flat pinch plates with
holes, the two rubber pads with holes, the
two 1/4"X1” bolts and the two 1/4" lock
washers. Slip a lock washer onto each bolt,
then slip the bolts through one of the plates
and through one rubber pad. Take this
assembly and install it on the car from inside
the trunk. Illustration 6
Illustration 6
Illustration 7
10. Unpack the fuel pump, read and
understand the instructions included with the
pump. Locate the two 90 degree barbed
fittings. Wrap the threads with thread sealing
tape and using a 12mm combination wrench
install them in the pump. Tighten the fittings
and make sure they point away from the
motor end of the pump. Illustration 8
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Electric Fuel Pump Installation Instructions
reinstall the lock washer. Start and tighten
the bolt. Tighten the bolts just until the lock
washers are flat. Illustration 9
Illustration 9
Illustration 8
12. It is time to tap into the fuel system.
Locate the hose connecting the front and
rear sections of the metal fuel line. It is near
the middle of the car. Use needle nose vise
grips to pinch it off. This way no fuel will flow
back from the carburetor end of the line.
Check the condition of this hose and snug
the clamps. Illustration 10
Illustration 10
11. Next, mount the pump to the car. It may
be helpful to have someone turn the bolts
while you align the pump. Make sure the
ground wire stays in place. The fittings on the
pump should point toward the front of the car.
Use a 7/16” socket to tighten the bolts. If you
experience trouble starting the bolts, remove
the lock washer from the bottom bolt and
reinsert it through the assembly, including the
ground wire. Use it to tighten the assembly
enough to get the upper bolt started. Snug
the upper bolt. Remove the lower bolt and
377-062
13. Next, locate the short section of hose
back at the tank. This is where you will tap
into the fuel system. Use a second pair of
needle nose vise grips to pinch off this hose.
Using a 1/4" nut driver, loosen the lower
clamp and remove the hose from the hard
line going forward. Use caution, some fuel
may spill out. Illustration 11
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Revised 1/06
Electric Fuel Pump Installation Instructions
Illustration 11
Illustration 12
15. Once all the fuel is drained, disconnect
the drain hose and remove the short hose
from the car. Illustration 13
14. Find a coupling of some kind to attach the
5/16” hose included in the kit to the short
piece of hose in the car. Put the other end into
a fuel approved container. Once both ends are
contained, release the vise grips slowly and
allow the rest of the fuel in the tank to flow out.
Make sure your container is large enough to
hold all the fuel. Illustration 12
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Illustration 13
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Revised 1/06
Electric Fuel Pump Installation Instructions
16. Next, cut the included 5/16” hose into
pieces. (Same hose used to drain the tank.)
Cut a 4” piece, a 28” piece, a 29” piece, and
the remainder should be 48”. Illustration 14
Illustration 14
Illustration 16 con’t
17. Gather together the 4” piece, the 29”
piece, and the fuel filter. Connect the 4” piece
to the OUT side of the filter and the 29” piece
to the IN side. Note: Arrow indicates direction.
Slide on two hose clamps on each side of the
filter. Slide two clamps up to the ends of the
filter and tighten the clamps. Illustration 15
Illustration 15
19. Now, slip a clamp on to each end of the
28” piece of hose. Route this hose from the
pump OUT to the hard line headed forward.
Slip the clamps into place and tighten. Tuck
the looped hose behind the other hose to
gain clearance from the exhaust. Once
everything is tight, remove the 2nd pair of
needle nose vise grips from the center fuel
line. Illustration 17
18. Connect the filter end to the IN side of
the pump and tighten the clamp. Next, route
the hose to the hard line coming out of the
tank. Connect to the hard line by making a
lazy loop and sliding it on. Slip the clamp into
place and tighten it. A 1/4", 1/4” drive socket
and ratchet may be necessary to tighten the
clamp. Illustration 16
Illustration 17
Illustration 16
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Revised 1/06
Electric Fuel Pump Installation Instructions
Illustration 19 con’t
Illustration 17 con’t
20. Route the fuel pump main power wire.
(140” large red wire) Start at the pump and
work your way forward. Connect the small
ring connector to the electrical connection on
the rear of the pump. Use the included brass
nut and a 11/32” combination wrench to snug
the wire to the stud. Snug firmly, do not over
tighten. Illustration 18
22. There is a small square passage that
runs parallel to and under the drive shaft
tunnel. Push the wire through this passage
until it exits the front. Once it comes out the
front, pull all the slack through. Now, push it
over the top of the transmission mount. Pass
it under the body mount, pull it snug and tie
wrap it near the hose you previously pinched
off. Pass it through the next body mount and
push it up and through a hole with a grommet
that the speedometer cable comes through. It
is important to keep the wire away from the
exhaust. Go back and secure it with tie wraps
where it may need it. Illustration 20
Illustration 18
21. Follow the new fuel hoses around the
corner until you reach the hard lines. Tie
wrap the wire to the hoses and hard lines in
a couple of places to secure it and keep it out
of the axle shaft and clear of the exhaust.
Illustration 19
Illustration 20
Illustration 19
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Revised 1/06
Electric Fuel Pump Installation Instructions
Illustration 20 con’t
23. From up on top, pull the slack up. Follow
the speedometer cable to the firewall. Tie wrap
the wire to the cable at one point. Illustration 21
Illustration 21
24. Next, mount the relay to the firewall. Use
a cordless drill with a #2 phillips screwdriver
tip and the self drilling screw or use a #30
drill bit. Mount the relay to the firewall in the
open space near the windshield wiper motor.
Illustration 22
Illustration 22
25. Once the location is selected and the
screw hole drilled, leave the relay loose to
ease wire installation.
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Revised 1/06
Electric Fuel Pump Installation Instructions
26. Locate the wires that you previously
made and locate the fuse box under the hood
on the left hand inner fender. Illustration 23
Illustration 24 con’t
Illustration 23
28. Next, using a 7/16” socket, remove the
bolt under the relay location, near the wiper
motor. Mount the ring connector of the last
black wire here. Scrape a little paint away to
insure a good connection. This is the relay
ground. Illustration 25
27. At the fuse box, the second circuit down
from the top is switched by the ignition
switch. There are free terminals behind the
wires connected to the outside terminals.
Connect one end of the yellow wire to the
free terminal on the front side of the fuse box
and connect the inline fuse holder to the free
terminal on the rear side of the fuse box.
Route the yellow wire rearward over the fuse
box and tie wrap it to the wire of the inline
fuse holder. Route both wires under the wiper
motor and to the relay location. Illustration 24
377-062
Illustration 25
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Revised 1/06
Electric Fuel Pump Installation Instructions
Illustration 28
29. Connect the wires to the relay. First,
connect the large red wire from the pump to
the #87 terminal on the relay. Next, connect
the yellow wire to the #86 terminal, the red
wire with the fuse to the #30 terminal, and
finally the black wire to the #85 terminal.
Mount the relay to the firewall. Illustration 26
32. Using a 1/2" socket, unfasten the hard
line from its mount at the front of the engine
and disconnect it from the carburetors.
Remove the line from the car. Illustration 29
Illustration 26
30. Now, disconnect the hose between the
factory fuel filter and the fuel pump at the
filter. Illustration 27
Illustration 29
Illustration 27
31. Using a 1/2" combination wrench,
disconnect the hard line from the fuel pump
that routes around the front of the engine and
to the carburetors. Illustration 28
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Revised 1/06
Electric Fuel Pump Installation Instructions
the 5/16” hose. Mark and cut the 5/16” hose.
Slip the last new clamp over the 5/16” hose
and an old clamp over the 1/4" hose. Use the
reducing coupling to connect the two hoses.
Slide the clamps into place and tighten. Tie
wrap the hose to secure. Illustration 31
33. Using a 1/2" combination wrench,
remove the mechanical fuel pump. Clean the
surface and install the new gasket and block
off plate. Secure with the two flat washers
supplied in the kit and the lock washers and
nuts that were removed. Tighten to 18 ft. lbs.
Illustration 30
Illustration 30
Illustration 31
34. Use the remaining 48” piece of 5/16” fuel
hose to connect from the original fuel filter and
route it up over the valve cover. Secure it to
the brake booster vacuum hose. If you have a
Moss Motors Supercharger, cut the hose to
the correct length and attach it to the
carburetor at the back of the supercharger. If
the car has carburetors, continue following the
vacuum hose forward. Tie wrap it to the brake
booster hose. Use the included 8” piece of
1/4" hose to connect the tee at the carburetors
to the new 5/16” hose. Use one of the clamps
you removed from the tee to attach the new
1/4" hose to the tee. Hold the 1/4" hose along
side the 5/16” hose to figure out where to cut
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Revised 1/06
Electric Fuel Pump Installation Instructions
Illustration 31 con’t
35. Refill the fuel tank and replace the
contents of the trunk.
36. Next, reconnect the battery negative
cable. Turn the ignition switch to the ON
position. You should hear a fast rattling
sound coming from the pump. The sound
should slow and go away after the pump gets
fuel. Check all connections for leaks. Check
the carburetors and make sure they are not
overflowing. If all is well, lower the car to the
ground and start the engine.
37. The pump is factory set to approximately
2 1/2" psi (pounds per square inch) and 1
turn clockwise is about 1 psi more. If you
know what pressure you want, make that
initial adjustment now.
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Revised 1/06
Electric Fuel Pump Installation Instructions
TR-6 Electric Fuel Pump
Contents of the kit
Note- Specifications and components are subject to change and revision without notice.
Item No.
Qty.
UOM
Description
377-382
772-325
051-016
051-101
771-992
772-269
770-302
772-331
051-262
051-261
051-191
052-343
772-330
772-332
161-610
772-334
772-335
771-276
052-078
772-336
051-387
052-074
161-637
770-269
051-212
052-054
772-337
1
1
10
1
2
2
2
1
109
8
8
1
2
2
5
3
154
27
1
1
6
3
1
1
2
1
1
EACH
EACH
EACH
EACH
EACH
EACH
EACH
EACH
INCH
INCH
EACH
EACH
EACH
EACH
INCH
INCH
INCH
INCH
EACH
EACH
EACH
EACH
EACH
EACH
EACH
EACH
EACH
PUMP, HIGH FLOW
FUEL PUMP BLOCK OFF PLATE, TR6
CABLE TIE, 4IN.
RELAY 12V 30A SPST
CAP SCREW, 1/4-20 X 1.0, ZINC
LOCK WASHER, 1/4", ZINC
WASHER, FLAT, SAE, 5/16 IN.
SCREW, #8-18, SELF DRILL&TAP
HOSE, FUEL, HP, 5/16 IN, INCH
HOSE, FUEL, HP, 1/4 IN., INCH
CLAMP, HOSE, MINI, SAE NO. 4
FUEL FILTER, FOR 1/4 IN HOSE
FUEL PUMP PINCH PLATE
RUBBER ISOLATOR, 2" X 2"
WIRE, BLACK, 16 GAUGE
WIRE, 14 GAGE, BLACK
WIRE, 14 GAGE, RED
WIRE, YELLOW, 18 GA., BULK
FUSE HOLDER, 12 GA, INLINE
FUSE, 5 AMP
SPADE CON, FEMALE, 22-18 GA
RING CON, 16-14 GA, 1/4IN
RING CONN, #8, 16-14 GA. WIRE
BUTT CONNECTOR, 14-16 GA, BLUE
HOSE BARB,1/8NPT X 5/16 X90DEG
HOSE BARB, REDUCER, 1/4 X 5/16
INSTRUCTIONS,TR6 FUEL PUMP KIT
377-062
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Revised 11/05