B&M 46059 COMMANDFLO, BLUE - Manual (Page 2)

STEP 1. Remove the fuel pump fuse
from the fuse box. Try starting the
vehicle several times until it will not
remain running. This will help re-
lieve pressure in the fuel system.
Remove the plug and washer on the
top of the fuel filter and attach an
accurate pressure gauge. Remove
and plug the vacuum line running to
the fuel pressure regulator. Replace
the fuse and start the vehicle. Note
fuel pressure.
STEP 2. Again, remove the fuel
pump fuse from the fuse box. Try
starting the vehicle several times
until it will not remain running.
This will help relieve pressure in
the fuel system. Remove the nega-
tive battery cable.
STEP 3. Using a pair of pliers,
loosen the clamp holding the re-
turn fuel line to the fuel pressure
regulator. Place a rag over the
connection and carefully slide the
fuel line off of the regulator.
STEP 4. Using a 10mm socket
and short extension, remove the
two bolts holding the stock regula-
tor to the fuel rail. Remove the
regulator. Be careful of spraying
fuel!
STEP 5. Remove and inspect the
regulator o-ring for tears. Replace
if damaged.
STEP 6. Carefully mount the regu-
lator body in a vise and mark 1/4"
down on the regulator "hat." Using
a hacksaw, cut off the top of the
regulator hat at the mark. Be care-
ful: the top is under pressure from
the spring inside! Remove and dis-
card the top and spring (see fig.
1).
STEP 7. Using a file, remove the
sharp edges from the regulator.
ASSEMBLY
STEP 8. On the underside of the
new CommandFlo body, carefully
insert the supplied silicone o-ring
into the machined groove.
STEP 9. Again, from the under-
side thread the brass piston into
the CommandFlo body until it bot-
toms out. Thread the supplied
stainless steel nut onto the brass
piston but
do not tighten.
STEP 10. Position the supplied
spring into the CommandFlo
body, making sure to seat it on the
brass piston. Without dropping the
spring, install the CommandFlo
body onto the stock pressure regu-
lator. Place a drop of Locktite® on
each of the four supplied 6-32 bolts
a n d c a r e f u l l y a t t a c h e d t h e
CommandFlo base (use caution
when installing the screws to avoid
stripping out the base). Once the
b a s e i s a t t a c h e d , a l i g n t h e
CommandFlo assembly as shown
(see fig. 1).
STEP 11. Hand tighten each of
the four bolts until the base and
body come together. DO NOT
OVER TIGHTEN!
STEP 12. Reinstall the stock regu-
lator o-ring and attach the assem-
bly the fuel rail. Using the 10mm
socket, tighten the two bolts to 6
lb-ft.
STEP 13. Slip the return fuel line
back onto the regulator and re-
tighten the clamp.
STEP 14. Reinstall the fuel pump
fuse and negative battery cable.
STEP 15. Turn the key to on but
do not start vehicle. Repeat this
three times. Check the regulator
for leaking fuel. If there is evi-
dence of a leak, repair before pro-
c e e d i n g . N O T E : T h e
CommandFlo does not directly
connect to the fuel side and thus
will not cause the regulator to leak.
STEP 16. Start the vehicle and
using a 3/16" wrench, adjust the
fuel pressure to the desired value
based on the pressure measured
before disassembly. Turning the
piston clockwise will raise pres-
sure while counterclockwise will
lower pressure. Once the pressure is set, tighten the jam nut.
STEP 17. Remove the factory
vacuum line and replace it with
the longer supplied line. Cut to fit
if necessary.
STEP 18. For nonpermanent type
gauge sets, remove the fuel pump
fuse from the fuse box. Try start-
ing the vehicle several times until
it will not remain running. This will
help relieve pressure in the fuel
system. Remove the fuel pressure
gauge and reinstall the plug and
washer on the top of the fuel filter.
Replace fuel pump fuse.
STEP 19. Verify that there are no
signs of fuel leakage.
Tool List
Fuel Pressure Guage
10mm Socket and Drive
3/16", 1/2" Wrench
Pliers
Hacksaw
7/64" Hex Wrench
Rags
Figure 1
Stock regulator
body
CommandFlo base
O-ring
Piston CommandFlo body
6-32 bolts
Jam nut
Discard this
section 1/4"
Align CommandFlo body as shown
Spring
Parts List
1 CommandFlo Body
1 CommandFlo Base
1 Brass Piston
1 Spring
1 Silicone o-ring
4 6-32 Bolts
1 Jam Nut
1 Vacuum Line
1 Tube of Locktite®
1 Instruction Sheet