MotorVac CarbonClean Dual System MCS 352 - Manual (Page 22)

Throttle Body Injection (TBI) Cleaning Procedure
WARNING: BEFORE BEGINNING THE RAIL FLUSH PROCEDURE IT IS
IMPORTANT TO TEST THE VEHICLE FOR INJECTOR LEAKDOWN. IF AN
INJECTOR IS STUCK OPEN IT IS POSSIBLE TO DAMAGE THE ENGINE DUE
TO ‘HYDROLOCK”. (LIQUID FILLING THE CYLINDER). IF THE VEHICLE
HAS INJECTOR LEAKAGE DO NOT DO THE RAIL FLUSH, PROCEDE
DIRECTLY TO THE ENGINE RUNNING-CLEANING PROCESS.
RAIL-FLUSH PROCEDURE. Follow these steps to circulate the cleaning mixture
through the
TBI unit to clean the throttle body, injector screens, and pressure regulator.
1. Verify that TBI 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 until pressure builds.
5. Turn the Gasoline (Petrol) PRESSURE REGULATOR clockwise until closed. While in the
recirculating (rail-flush) mode, the TBI unit is being cleaned, and the particles are filtered
through the unit’s filter.
6. Check all connections for leaks.
x M ake a note of the fuel pressure reading; this is the true opening pressure of the
vehicle’s pressure regulator without vacuum assist when the engine is at normal
operating temperature.
x NOTE: By turning the Gasoline (Petrol) PRESSURE REGULATOR in and out and
“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 knob for an additional 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.
10. When the run time expires, the cleaning is complete. The unit will automatically shut off and
the alarm will sound. Press off the
ON/OFF switch.
11. Turn OFF the vehicle's ignition.