Cold engine
1. Disconnect two hoses from the ejector.
2. Push the accelerator pedal down to the floor and release it gently to engage the fast idle cam.
3. Start the engine; it should run at fast idle. If this is not the case, remove the throttle cover and check the operation of the fast idle cam.
4. Connect a vacuum pump to the internal outlet of the ejector and obtain a vacuum. The speed of fast x.x. should go down. After that, allow the engine to fully warm up and follow the procedures for a warm engine.
5. If the speed of fast x.x. does not drop - check the ejector for leaks, blockage or damage. Remove the throttle cover and check the ejector rod for freedom of movement.
Warmed up engine
1. Warm up the engine. As soon as the engine warms up to the required temperature, the speed of the fast x.x. should drop below 1400 rpm as the kicker pulls the choke lever away from the fast idle cam.
2. If the fast speed does not decrease, check the vacuum in the lines.
3. If there is a vacuum, check the ejector for leaks or blockage. If required, remove the damper cover and check the ejector rod for freedom of movement.
4. If there is no vacuum at the inner fitting, check the vacuum at the damper opener and thermal valve A.
5. If there is no vacuum at the external fitting, check thermal valve A and replace if necessary.