Colt L4-1795cc 1.8L SOHC (1994)
Throttle Body: Service and Repair
Throttle Body (Throttle Valve Area)
1. Start the engine and warm it up until the 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 arrow 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 on-board diagnostic code or disconnect the battery ground cable for more than 10 seconds and then connect it again.
10. Adjust the basic idle speed.
NOTE: If the engine hunts when idling after adjustment of the basic idle speed, remove the negative cable from the battery for 10 seconds or
more, and then run the engine at idle again.