Contents: Cold engine ⇊ Warmed up engine ⇊
Cold engine
1. Disconnect the two hoses from the ejector.
2. Press the accelerator pedal to the floor and release it smoothly to engage the fast idle cam.
3. Start the engine; it should run at fast idle. If it does not, remove the throttle cover and check the fast idle cam for proper operation.
4. Connect a vacuum pump to the inside of the ejector hose and obtain a vacuum. The fast idle speed should decrease. After this, allow the engine to warm up completely and perform the procedures for a warm engine.
5. If fast idle speed does not decrease, check the release valve for leaks, blockage or damage. Remove the throttle cover and check the release valve rod for free movement.
Warmed up engine
1. Warm up the engine. Once the engine has reached the proper temperature, the fast idle speed should drop below 1400 rpm as the release pulls the choke lever away from the fast idle cam.
2. If the fast idle speed does not decrease, check the vacuum in the lines.
3. If there is a vacuum, check the release for leaks or blockages. If necessary, remove the valve cover and check the release rod for freedom of movement.
4. If there is no vacuum in the internal fitting, check the vacuum in the damper opener and thermovalve A.
5. If there is no vacuum in the external fitting, check the thermal valve A and replace it if necessary.