MotorVac CarbonClean System MCS 245 - Manual (Page 20)

Carburetor Cleaning Procedure
Follow the steps below to circulate the fuel/detergent mixture through the vehicle's carburetor.
1. Verify that Carburetor Setup Steps 1-18 above have been completed.
2. Refer to the vehicle's service manual for the manufacturer's recommended PSI.
• At this point, refer to appropriate Intake System Cleaning Procedure section for proper intake
cleaning, and Vacuum gauge connections in the vehicle diagnostics chapter.
3. Press and hold the Start button.
4.
Turn the Pressure Adjust regulator clockwise until the Fuel Pressure gauge reads 4
PSI, or the equivalent of the manufacturer's recommended specifications. It may be
necessary to increase the pressure to the level previously noted in Step 10 of the
Carburetor Setup Procedure .
5.
Release the Start button.
6.
Press the ­ button to increase the time, or the ▬ button to decrease the time until the
Time LED displays 30 minutes. (Run time may be adjusted depending on the
condition of the vehicle’s fuel system.)
7. Start the vehicle to begin the fuel system cleaning process.
• When the cleaning process is halfway completed (check
Time LED display), step on the vehicle’s
accelerator quickly three or four times. Then, maintain RPM at 1500 - 2000 for 30 seconds.
8. When the run time expires, the cleaning is complete. The unit will automatically shut
off and purge the pressure lines for five seconds. The Cycle Complete LED on the
control panel will illuminate, and the unit’s alarm will sound.
9.
Turn OFF the vehicle's ignition.
10.
Turn the Pressure Adjust regulator counterclockwise on the unit to open it. Press
and hold the Fill/Purge button for four seconds to relieve pressure from the output
( red ) hose. Release the Fill/Purge button.
11. Loosen the vehicle's gas cap to relieve fuel tank pressure, and then re-install cap.