English – Actron Professional Fuel Pressure Tester Kit CP7838 User Manual
Page 5
For import and domestic vehicles with
rubber hose connections...
Relieve fuel system pressure by following
instructions in vehicle service manual.
Disconnect the vehicles rubber fuel line hose
at location described in service manual. Use
shop towels to catch any released fuel.
Leave rubber hose attached to fuel line.
Install matching size adapter hose and hose
clamps on dual manifold test adapter.
Connect test adapter hose at location where
vehicles fuel line was disconnected.
Connect vehicles fuel line to other side of
dual manifold adapter. Use vehicles hose
clamps on rubber hose.
Tighten all hose clamps securely.
Connect hose and pressure gauge assembly
to dual manifold test fitting. Tighten gauge
hose fitting finger tight.
English
2 0
10 0
psi
4 0
6 0
8 0
10 0
2 0 0
300
500
400
6 0 0
7 0 0
kPa
Fuel Filter
Fuel Line
from tank
Dual Manifold Test
Adapter
5. Place end of 6 foot bleed-off hose in an
approved container for fuel.
Bleed-off hose must remain in container until
testing is complete.
6. Turn all accessories OFF. (Radio, A/C, Blower
Fan, Headlights, Windshield Wipers...)
7. Re-activate fuel pump and turn ignition key ON.
Do the following checks:
Listen for fuel pump. Pump should run for
approximately 2 seconds.
Pressurize fuel system by cycling ignition ON
and OFF every ten seconds until fuel pressure
is at manufacturers specifications (check
vehicle service manual for your particular
application.)
Check fuel system for leaks. If leaks are
found, turn ignition key OFF and wipe up fuel
immediately!
Read fuel pressure from dial face. Pressure
should rise to manufacturers specification and
hold steady.
If fuel pressure is not within manufacturers
specification, cycle ignition key 2 or 3 more
times. If fuel pressure is still not within
manufacturers specifications, service vehicle
according to vehicle service manual, then re-
test.
When key-on-engine-off fuel pressure is within
manufacturers specification, proceed to Step
8.
To safely disconnect Fuel Pressure Test Kit,
proceed to Step 9.
8. Start engine Let idle.
If vehicles fuel system uses a vacuum
actuated (compensated) fuel pressure
regulator then fuel pressure should drop
approximately 3-10 psi, depending on manifold
vacuum.
If vehicles fuel system uses a fuel pressure
regulator without a vacuum port then fuel
pressure should remain constant during both
key-on-engine-off and idle.
Read fuel pressure from dial face.
If fuel pressure is not within manufacturers
specification, service vehicle according to
vehicle service manual.
When repair is completed and idle fuel
pressure is now within manufacturers
specification, then proceed to Step 9.
9.Turn Ignition Key OFF.
10.Verify that 6 ft. bleed-off hose is still in an
approved container for fuel.
11.Fully DEPRESS and HOLD the pressure relief
button until dial face pointer is resting on stop
pin.
12.Shake bleed-off hose to make sure that all fuel
went into approved container.
13.Remove gauge hose.
For GM/Chrysler Vehicles with test port...
Wrap a shop rag around fuel rail test port in
case a small amount of fuel drips out while
unscrewing test port adapters.
Unscrew GM/Chrysler test port adapter from
fuel rail test port and reinstall the Test Cap.
Wrap a shop rag around GM/Chrysler test port
adapter so any fuel dripping from gauge hose
is absorbed.
Remove bleed-off hose from approved fuel
container and hold gauge hose over container
so any remaining fuel will drip into container.
For Ford/Lincoln/Mercury vehicles with test
port...
Wrap a shop rag around fuel rail test port in
case a small amount of fuel drips out while
unscrewing test port adapters.
Unscrew GM/Chrysler test port adapter from
Ford test port adapter.
Wrap a shop rag around GM/Chrysler test port
adapter so any fuel dripping from gauge hose
is absorbed.
Remove bleed-off hose from approved fuel
container and hold gauge hose over container
so any remaining fuel will drip into container.
Unscrew Ford test port adapter from fuel rail
test port and reinstall the Test Cap.