Checking the pressure sensor (Focus Turnier 1)

Disconnect the hose on the pressure sensor and close it with your finger

Have your assistant start the engine and bring it up to medium speed (about 2000 rpm).

When the speed is uniform, reconnect the hose to the sensor.

Since there is again a low pressure on the sensor, the ignition timing adjustment from the control unit should work. With the gas pedal position unchanged, the engine speed increases significantly.

If the RPM remains constant, this indicates a leaky vacuum hose or a faulty pressure sensor. The engine confirms this with reduced power and worse exhaust gas values.

The original can be found on this resource (FORDBOOK)