iSmartINC 402 Injector Cleaner & Tester User’s Manual
9
On-Vehicle Cleaning
After the engine has been in operation for a period of time, its
fuel flow may be blocked or become un-smooth owing to
buildup of dust and impurities in fuel channel. In addition, the
carbon deposits and gum made by combustion can easily
adhere to the injectors, inlet and outlet ports, inlet and outlet
hoses, throttle and combustion chamber. So the fuel supply
system, combustion chamber and injectors of the engine
must be cleaned on a timely basis. On-vehicle cleaning is a
solution that can save your time and labor.
Procedures
1) Please check if there is test liquid or detergent inside the
fuel tank before on-vehicle cleaning. If test liquid is in
the tank, replace it with detergent. The detailed
procedure to be followed: remove the level indicator on
the left of the main unit, and drain the test liquid inside
fuel tank into a container. If the drained test liquid
contains lots of impurities and can not be reused, please
dispose it in the proper way and fill with new test liquid. If
the drained test liquid is clean, please store it for later
using.
2) Blend the detergent with the fuel at a certain ratio, and fill
the mixture into the fuel tank. (Consult the user’s manual
of detergent for blending ratio.) Refer to the following
table for filling amount, as shown in the following table:
No. of
cylinders
4
cylinder
6
cylinder
Amount
about 800~1000ml
about 1500ml
3) The connection of engine fuel pipes has been shown in
“Connecting” below.
4) Choose [On-vehicle cleaning] function on the control
panel, and set the time and press [Run] button to start the
test, then start the engine with park gear.
5) Refer to specifications required by various vehicle
types to adjust system pressure by pressing
[decrease pressure]/[increase pressure] key(The
user can press the
［ ］
key then press run key the
system pressure will come back to the default
pressure value When the function of item section is
working).Press [Stop] button at any time to stop the
cleaning.
Fig.07
1- Fuel-return connector; 2- Fuel-return hose from engine;
3-Fuel-inlet hose to engine
Connecting
The hose line connection of the engine with return hose is
shown as in Fig.08.
1) Disconnect the connections of fuel supply hoses (C
、
D)
and fuel return hoses(A
、
B) of the engine fuel
system( wrap the connector with towel when
disconnecting the connector). Choose proper connectors
and connect them to the B end and C end separately,
and then connect the other ends to corresponding return
hose and outlet hose of the unit. See Fig.08.
2) Connect the disconnected other ends (A
、
D) with proper
hose, or remove the fuel pump fuse, or disconnect the
power cable of engine fuel pump.
Fig.08
1-CNC Injector Cleaner & Tester; 2-Engine; 3- Fuel-return hose
from engine;
4- Fuel-inlet hose to engine; 5-Engine fuel
supply hose; 6-Engine fuel return hose; 7- Auto fuel pump;
8-Auto tank
Without return hose connecting:
The hose line connection of the engine without return hose
is shown as in Fig.9.
1) Disconnect the fuel supply hoses (E, F) of engine fuel
system (wrap the connector when disconnecting the
connector), and then choose a proper connector and
connect it to the E end. Reconnect the fuel outlet hose
of the unit well and make the fuel return hose hanging.
See Fig.9.
2) Stop the other end of the disconnected end (F) with a
proper stopper, (use when the fuel pump has the fuel
return function only) or remove the fuse of fuel pump or
disconnect the power cable of fuel pump.
Fig.9
1-CNC Injector Cleaner & Tester; 2-Engine; 3-stopper; 4-
Fuel-inlet hose to engine; 5-Auto tank;6- Engine fuel supply
hose; 7-Auto fuel pump
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