Only operate the engine in a well ventilated area with
adequate exhaust ventilation. Prior to performing the cleaning
procedure, clean and inspect the air intake system and idle air
control systems. Also inspect the air filter element and replace as
necessary. Prior to performing the cleaning procedure, inspect fuel
system cleaner adapters, connectors, hoses and tools for wear and
damage and replace as necessary. Use fuel resistant thread
sealant on connections when required. The fuel system cleaner
aerosol can must be kept at room temperature to assure proper
1. Start the engine and allow to reach the operating temperature.
2. Place the ignition switch and all accessories in the off position.
3. Disable the fuel pump by removing the fuel pump fuse or
relay or by disconnecting the fuel pump electrical connector.
Refer to the vehicle manufacturer's section for the appropriate
4. Start and operate the engine until it stalls.
5. Attempt to restart the engine until it will no longer run, then
place the ignition switch in the off position.
6. Remove the fuel filler cap to release fuel tank pressure.
7. Block off the fuel return line on return type fuel systems so all
of the cleaner will be directed through the injectors to the
intake valves and combustion chamber.
8. Ensure the fuel system cleaner can adapter flow control
lever is in the off position. The lever is in the closed
position when the handle is pointing away from the hose.
9. Ensure the fuel system cleaner regulator valve is in the
closed position. The regulator valve is in the closed position
when the knob is fully turned in the counter clockwise direction.
10. Attach the regulator to cleaner hose quick
11. Thread the fuel system cleaner can adapter to the can of
fuel system cleaner. Hand tighten only.
12. Place the cleaner can in the upside down position and attach it
to the regulator. The can must be kept in the upside down
position through out the cleaning procedure.
13. Place the cleaner can in the hanger bracket, then hang the can
in a secure under hood location. Always keep the cleaner and
hoses way from engine ignition sources, heat sources and moving
14. Connect cleaner supply hose and adapter the vehicle
fuel system, Following the procedure outlined in the
vehicle manufacturer's sections of the this guide.
Always place a shop towel the connection to prevent fuel
15. Slowly turn the cleaner regulator valve clockwise until the
cleaning pressure is approximately the same as the vehicle's
minimum recommended operating fuel pressure. The
vehicle's recommended fuel pressures are listed in
the vehicle manufacturer's sections of this guide.
16. Open the fuel system cleaner hose valve and check for leaks. If
a leak is present, close the valve immediately and correct the
leak condition before proceeding.
17. Start the engine and allow to idle. Keep the cleaner pressure
at or near the vehicle fuel pressure specification to prevent
damage to the fuel supply and return systems.
18. When the vehicle stalls from lack of cleaner, place
the ignition switch in the off position.
19. Turn the cleaner hose valve off, then turn
the regulator valve fully counterclockwise.
20. Position a shop towel over the fuel cleaner adapter
to vehicle fuel supply system connection,
then disconnect the adapter.
21. Remove plugs and clamps from the vehicle's
fuel return line. If the fuel return line remains
blocked, damage to the fuel pressure regulator
and pump may result.
22. Connect all lines and enable the fuel pump. Refer to
the vehicle manufacturer's section for the
23. Place the ignition switch in the on position to allow
the fuel system to pressurize.
24. Check the fuel system for leaks prior to starting
25. Start the engine and check for fuel system leaks.
26. Clear residual fuel system cleaner and allow
the vehicle computer to readjust by driving the
vehicle at highway speed for at least 15 to 20
27. After cleaning the fuel system, inspect the fuel
filter and spark plugs and replace as necessary.
28. Thoroughly clean fuel system cleaner adapter,
hoses and tools after each use. Also the pressure
regulator valve knob should be turned fully
counterclockwise when not in use.