MotorVac CarbonClean System II LE-1 - Manual (Page 26)

Overview
1998 MotorVac Technologies, xxv
Port Fuel Injection (PFI) Cleaning Procedure
Follow these steps to circulate the cleaning mixture through the Port Fuel Injection unit to clean the
fuel rail, injector screens, and pressure regulator.
1. Verify that PFI Setup Steps 1-11 above have been completed before continuing.
2. Refer to the vehicle's service manual for the manufacturer's recommended PSI.
3. Adjust Time until it displays 10 minutes.
4. Press and hold the Start/Run switch.
5.
Turn the Pressure Adjust regulator clockwise until the gauge displays 4 PSI. The pump will
remain on.
6.
Release the Start/Run switch and continue to turn the Pressure Adjust regulator clockwise until
it is completely closed. This will clean the PFI unit, injector screens, fuel rail, and pressure
regulator and filter the contaminants through the LE-1’s filtering system.
Check all connections
for leaks.
•
Make 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.
•
NOTE: By turning the Pressure Adjust regulator in and out and “PULSING” the mixture from
time to time, the cleaning process will be enchanced in this mode.
7. After the 10 minutes has expired, adjust Time to 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
LE-1’s alarm will sound.
11.
Turn OFF the vehicle's ignition.
12.
Turn the Pressure Adjust regulator counterclockwise on the unit to release any residual
pressure.