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Where is the idle adjustment screw located on a 1993 Nissan Sentra Classic?
GordD
The adjustment srew is not really a srew, it's mor like an adjustment bolt with a handle wheel at the end and is located under the air filter facing the firewall of the engine compartment means back. Now if you want to adjust the idle and your car is equipped with an air-con, you have to adjust first without air-con. After the idle is adjusted to around 850rpm, switch on the air-con. The idle should be the same. If it changes you have to adjust the actuator for the idle-up. This is on the passenger side of the carb. It's vacuum controlled. If the air-con is switched on it should pull back and pull the flap more open in order to increase the idle to handle the higher load of the engine through the compressor. If the actuator is not moving, check the vacuum line and solonoid valve. If the actuator pulls the flap open, but doesn't release after switching the air-con off, so that the idle goes up to 1500 or more, the vacuum lines at the solonoid are most likely switched.
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∙ 15y ago
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