MAHLE RTI ESX-2 - Manual (Page 15)

Page 14
Throttle Body Injection (TBI) Cleaning Procedure
The following steps will circulate the cleaning mixture through the Throttle Body Injection System
cleaning the throttle body, injector screens and pressure regulator.
1. Verify that the Throttle Body Injection Setup section is complete.
2. Press and hold the Start button.
3. Turn the ESX Pressure Control regulator clockwise until the Fuel Pressure Gauge displays at
least 4 psi or the Cleaning Arrow LED stays illuminated. This will clean the TBI unit, injector
screens, throttle body, and pressure regulator and filter any contaminants through the ESX
filtering system.
4. Release the Start button and continue to turn ESX Pressure Control regulator clockwise until
it is completely closed. Make a note of the Fuel Pressure gauge reading. This is the true
operating pressure of the vehicle pressure regulator without vacuum assist when the engine
is running at normal operating temperature.
Caution: If a Leakdown test has not been performed, do not proceed with the following
steps. Refer to the Setup procedure for the correct instructions.
5. Press the + button to increase or the - button to decrease the time on the ESX LED timer
display until the 10 minute LED is illuminated.
6. After time has expired on the rail cleaning process press the START button until the pressure
rises again.
7. Press the + button to increase or the - button to decrease the time on the ESX LED timer
display until the 30 minute LED is illuminated. Run time may be adjusted depending on the
condition of the vehicle fuel system.
8. Start the vehicle to begin the engine cleaning procedure.
9. When the time expires, the unit will automatically shut off and purge itself for five seconds.
This will shut off the engine and illuminated the PROCESS COMPLETE LED as well as sound
the buzzer. Turn the vehicle ignition OFF.
10. Turn the Pressure Control regulator counterclockwise to open it and press and hold the
FILL/PURGE button for five seconds to relieve pressure in the ESX Red Hose.
11. Disconnect loop adapter and use a shop rag at all connection points before disconnecting.
12. Disconnect the battery leads, hoses, and adapters. Reconnect all of the vehicle fuel lines.
Reinstall the vehicle fuel cap.
13. Start the vehicle and verify that there are no leaks in the fuel system.
14. Always test drive the vehicle for three miles or run at 3000 rpm for two to three minutes to flush
all RTI FUEL SYSTEM CLEANER out of the vehicle fuel and exhaust system.