Throttle Body Injection (TBI) Cleaning 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 1-18
above have been completed before continuing
2.
Refer to the vehicle's service manual for the manufacturer's recommended PSI.
3.
Press and hold the
Start
button.
4.
Close
the
Pressure Adjust
regulator clockwise until the
Fuel Pressure
gauge on the
unit displays the vehicles operating pressure and the
Up Arrow
LED stays illuminated
without flashing. This will clean the TBI unit and filter the particles through the
unit’s filtering system.
5.
Release
the
Start
button.
•
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.
•
At this point, refer to appropriate Intake System Cleaning Procedure section for proper intake
cleaning, and Vacuum gauge connections in the vehicle diagnostics chapter.
6.
Press
the
button to increases the time, or the
▬
button to decreases the time until
the
Time
LED displays 10 minutes.
7.
After the 10 minutes has expired on the
Time
LED display, press and hold the
Start
button until the pressure rises and then release.
8.
Press
the
button to increases the time, or the
▬
button to decreases the time until
the
Time
LED display indicates 30 minutes. (Run time may be adjusted depending on
the condition of the vehicle’s fuel system.)
9.
Start the vehicle
to begin the fuel system cleaning process.
