Throttle Body (Throttle Valve Area) Cleaning (Sohc 16 Valve); Closed Throttle Position Switch And Sensor Adjustment - Mitsubishi 1989-1993 GALANT Service Manual

FUEL SYSTEM <SOHC-16 VALVE>
TPS connector
THROTTLE BODY (THROTTLE VALVE AREA)
CLEANING
(1) Start the engine and warm it up until the engine coolant is
heated to 80°C (176°F) or higher and then stop the engine.
(2) Remove the air intake hose from the throttle body.
(3) Plug the bypass passage inlet of the throttle body.
Caution
Do not allow cleaning solvent to enter the bypass
passage.
(4) Spray cleaning solvent into the valve through the throttle
body intake port and leave it for about 5 minutes.
(5) Start the engine, race it several times and idle it for about
1 minute. If the idling speed becomes unstable (or if the
engine stalls) due to the bypass passage being plugged,
slightly open the throttle valve to keep the engine running.
(6) If the throttle valve deposits are not removed, repeat steps
(4) and (5).
(7) Unplug the bypass passage inlet.
(8) Attach the air intake hose.
(9) Use the scan tool to erase the diagnostic trouble code.
(10) Adjust the basic idle speed. (Refer to P.13-134.)
NOTE
If the engrne hunts when idling after adjustment of the basic
idle speed, remove the @ cable from the battery for 10
seconds or more, and then run the engine at idle again.
CLOSED THROTTLE POSITION SWITCH AND
THROTTLE POSITION SENSOR ADJUSTMEy,zIFF
(1) Disconnect the connector of the throttle position sensor.
(2) Connect an ohmmeter between terminal @I (closed throttle
position switch) and @ (sensor ground) by using jumper
wires.