Lancer L4-2.0L SOHC (2004)
Throttle Body: Service and Repair
Cleaning
THROTTLE BODY CLEANING
Required Special Tools:
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MB991958: Scan Tool (MUT-III Sub Assembly)
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MB991824: V.C.I.
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MB991827: USB Cable
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MB991911: Main Harness B
1. Start the engine and warm it up until the coolant is heated to 80 °C (176 °F) or higher. Then stop the engine.
2. Remove the air intake hose from the throttle body.
CAUTION: Do not allow cleaning solvent to enter the bypass passage.
3. Plug the bypass passage inlet (arrow) of the throttle body.
4. Spray cleaning solvent into the valve through the throttle body intake port and leave it for approximately five minutes.
5. Start the engine, rev it several times and then idle it for about one 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.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or
disconnecting the scan tool MB991958.
9. Use the scan tool to erase any diagnostic trouble code.
10. Adjust the basic idle speed.