Capri L4-1597cc 1.6L DOHC Turbo (1991)
Auxiliary Air Valve (Idle Speed): Service and Repair
Cleaning Procedures
Idle Air Bypass Valve (Nippondenso)
CAUTION: DO NOT use this cleaning procedure on the Nippondenso Idle Air Bypass valves, service is limited to replacement only. 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.
RECOMMENDED CLEANING PROCEDURE
1.
Verify bypass actuator is operating properly.
2.
Remove throttle inlet air tube.
3.
Connect the Rotunda Air Bypass Actuator 113-00009 and Injector Tester/ Cleaner 113-00001 or equivalent.
4.
START the actuator and then START the engine. DO NOT start engines of vehicles equipped with airflow meters.
5.
Spray carburetor cleaner into idle air bypass valve inlet for 5 seconds while actuator is operating.
6.
Turn OFF actuator and START engine.
7.
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 actuator and engine for one minute.
10.
Disconnect actuator from the bypass valve. Reconnect electrical connector to the bypass valve.
11.
START engine and verify proper operation.
ALTERNATE CLEANING PROCEDURE
1.
Remove Air Bypass Valve from the vehicle.
2.
Remove the electrical solenoid assembly from 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.
