Prizm L4-1800cc 1.8L DOHC (1993)
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Start and run engine until normal operating temperature is attained.
Install Tachometer
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Connect a tachometer to the battery and also to data link connector (DLC) terminal IG-.
Disconnecting Throttle Opener Vacuum Hose
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Disconnect throttle opener vacuum hose at throttle opener and plug the hose end.
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Maintain engine speed at approximately 25OO rpm.
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Release the throttle lever and make sure that the throttle opener is set and the engine speed is 1,300 - 1,500 rpm with the radiator fan motor OFF.
Replace the throttle opener if it does not set.
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Adjust throttle opener setting speed by turning the adjusting screw clockwise to increase engine speed and counterclockwise to decrease engine
speed.
