Contents: Removal and installation ↳ Adjustment ↳
Removal and installation
Remove the negative terminal from the battery. Remove the air filter housing.
Disconnect the vacuum hose from the throttle damper. Unscrew the 2 mounting screws. Disconnect the throttle damper and remove it.
Installation is performed in the reverse order of removal. If it is necessary to adjust the throttle damper, remove the air filter housing, connect the connector to the incoming air temperature sensor and the negative terminal to the battery.
Adjustment
Start the engine and warm it up to operating temperature (until the fan turns on).
Remove the air filter housing. Remove the electrical connector from the radiator fan temperature sensor. Short the contacts in the connector with an additional wire so that the radiator fan turns on continuously. Start the engine and hold it at 3000 rpm for 30 seconds. Then release the throttle valve and check the idle speed and mixture quality. Stop the engine.
Disconnect the throttle damper vacuum hose and connect the damper with a pipe of suitable length directly to the intake manifold. Start the engine and measure its speed. It should be higher than the nominal. If the engine speed is not normal, remove the seal from the upper part of the throttle damper housing and, by turning the adjusting screw, bring the speed to normal (see Fig. 4A.27).
After adjustment, stop the engine and install a new seal on the adjusting screw. Disconnect the tube from the inlet pipe and connect the vacuum hose of the throttle damper.
Remove the jumper from the radiator fan temperature sensor connector and plug the connector back in. Install the air filter, disconnect the tachometer and the mixture quality meter.
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