Contents: Idle speed ⬇ Maximum revolutions ⬇
Models with diesel engine up to 08.1997. (every year).
To adjust the idle speed of a diesel engine, a tachometer operating on the principle of a photocell is required. The photodiode of such a tachometer reacts to light reflected from a white mark. The number of revolutions is read directly from the device.
1. Apply a 1-2 cm wide chalk line to the front flange of the crankshaft pulley or stick a strip of aluminum foil of the same width.
Strip on crankshaft pulley
2. Start the engine and warm it up. After the coolant reaches operating temperature, drive the car for another 5 km to warm the engine oil to a temperature of at least 70 degrees.
3. Turn off all power consumers.
Idle speed
1. Check the speed with a tachometer. It should be in the range 830÷930 rpm.
2. If necessary, loosen the lock nut on the speed control lever on the high-pressure fuel pump and adjust the idle speed with the adjusting screw.
Adjusting the idle speed
3. Fix the adjusting screw.
Maximum revolutions
1. Press the gas pedal all the way down and check the RPM with a tachometer. Compare the obtained values with the requirements Vehicle settings and routine maintenance.
2. If necessary, loosen the lock nut of the maximum speed adjustment lever on the high-pressure fuel pump and adjust the maximum speed with the adjusting screw. First remove the protective cap from the adjusting screw.
Adjusting maximum speed
At maximum speeds above the requirements of the Specifications, in Chapter Vehicle settings and routine maintenance, engine damage may occur.
3. Secure the adjusting screw and place a new protective cap on it.
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