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Home >> Mercury >> 1994 >> Cougar/XR7 V8-281 4.6L SOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Idle Speed/Throttle Actuator - Electronic >> Service and Repair >> Procedures

Procedures

Idle Air Bypass Valve (Nippondenso):






RECOMMENDED CLEANING PROCEDURE


CAUTION: DO NOT use this cleaning procedure on the Nippondenso Idle Air Bypass Valves (above). These valves may be identified by their black plastic housing, and by a yellow and black warning label affixed to the valve housing and/or the throttle body. Nippondenso Idle Air Bypass Valve service is limited to replacement only.

1. Verify the bypass actuator is operating properly.

2. Remove the throttle inlet air tube.

3. Connect the Rotunda Air Bypass Actuator 113-00009 and Injector Tester/ Cleaner 113-00001 or equivalent.

4. On vehicles without airflow meters, "START" the actuator and then "START" the engine. DO NOT start engines of vehicles equipped with airflow meters.

5. Spray Carburetor Cleaner into air bypass valve for 5 seconds while actuator is operating.

6. DO NOT START engines on vehicles equipped with an airflow meter. Turn "OFF" the actuator and "START" the engine.

7. On vehicles equipped with an airflow meters, spray carburetor cleaner into idle air bypass passage for no more that six seconds.

8. Turn "OFF" actuator and "STOP" engine if running.

9. Install intake air tube "START" and "RUN" actuator and engine for one minute.

10. Disconnect the actuator from the bypass valve. Reconnect the electrical connector to the bypass valve.

11. "START" the engine and verify proper operation.


ALTERNATE CLEANING PROCEDURE

1. Remove the Air Bypass Valve from the vehicle.

2. Remove the electrical solenoid assembly from the mechanical portion of the Air Bypass Valve by removing the two screws, then sliding the mechanical portion away from the solenoid.

3. Soak the mechanical portion in carburetor cleaner.

CAUTION: Do not exceed three minutes soak time, and do not use choke cleaner, as an internal O-ring may begin to deteriorate.

4. With the mechanical portion completely submerged shake in all directions. Then push in on the rod that mates with the solenoid assembly, and again shake in all directions with the unit submerged and the rod held in as far as possible.

5. Remove the mechanical portion from the cleaning fluid and dry out thoroughly using shop air.

6. Assemble and install the valve.

7. Check idle speed.

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