MotorVac CarbonClean Dual System MCS 352 - Manual (Page 30)

Continuous Injection System (CIS) Cleaning Procedure
Follow the steps below to circulate the cleaning mixture through the CIS fuel distributor to clean the
pressure regulator and the top portion of the fuel distributor.
1. Verify that CIS Setup Steps 1-10 above have been completed before continuing.
2. Refer to the vehicle's service manual for the manufacturer's recommended pressure.
3. Adjust TIMER knob for 10 minutes. Press the ON/OFF switch on.
4. Press and hold the START/RUN switch.
5. Turn the Gasoline (Petrol) PRESSURE REGULATOR clockwise until the PRESSURE
GAUGE reads past 4 PSI. The pump will remain on.
6. Release the START/RUN switch and continue to turn the Gasoline (Petrol) PRESSURE
REGULATOR clockwise until it is completely closed. This will clean the CIS fuel distributor
and filter particles through the unit’s filtering system . Check all connections for leaks.
x Make a note of the fuel pressure reading; this is the true opening pressure of the vehicle's
pressure regulator when the engine is at normal operating temperature.
x NOTE: By turning the Gasoline (Petrol) PRESSURE REGULATOR in and out “PULSING”
the mixture from time to time, the cleaning process will be enhanced in this mode.
7. After the 10 minutes has expired, adjust TIMER for 30 minutes. (Run time may be adjusted
depending on the condition of the vehicle’s fuel system.)
8. Press the START/RUN switch.
9. Start the vehicle to begin the fuel system cleaning process.
x when the cleaning process is halfway completed, step on the vehicle’s accelerator quickly
three or four times. Then, maintain RPM at 1500 - 2000 for 30 seconds.

x If the vehicle is equipped with a Cold Start Injector , you may use a Pulse Tester to
energize the Cold Start Injector a few quick times during the run cycle to clean it.
10. DO NOT ALLOW CIS VEHICLES TO RUN OUT OF FUEL. TURN OFF THE VEHICLE’S
ENGINE BEFORE COMPLETION OF THE RUN CYCLE.