The operation procedure of fuel system cleaning
：
i.
Firstly, please check the car being with which kind of fuel system,
carburetor system or electronic fuel injection system.
ii.
Operation for the electronic fuel injection system as follows:
1.
The pipeline connection of the engine
Engine with fuel-return pipe
Plug
1-CFS Cleaner, 2-Engine, 3-Connecting the plug,
4- The fuel-outlet pipe of the CFS, 5-Filter, 6-Fuel-outlet pipe of engine,
7- Fuel-return pipe of engine, 8-Fuel pump, 9-Fuel tank
a) Disconnect the fuel-outlet pipe
（
C
、
D
）
and the fuel-return pipe
（
A
、
B
）
of the engine, and select a suitable connector to separately connect the
port B and port C to the plug and the outlet pipe of CFS.
b) Connect the left two ports (A, D) by a suitable pipe. Or unplug the engine
fuel pump fuse, or disconnect the power cable of the engine fuel pump.
