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How do you adjust the idle speed on a 1990 jaguar xjs v12?

How to Adjust the Idle Speed on a 1990 Jaguar XJS V12

1. Locate the idle speed adjustment screw. The idle speed adjustment screw is located on the throttle body. It is a small, black screw with a flat head.

2. Start the engine and let it warm up. The engine should be at normal operating temperature before you adjust the idle speed.

3. Use a screwdriver to turn the idle speed adjustment screw. Turning the screw clockwise will increase the idle speed, while turning the screw counterclockwise will decrease the idle speed.

4. Adjust the idle speed to the desired setting. The idle speed should be between 650 and 750 RPM.

5. Test the idle speed. Put the transmission in gear and release the brake pedal. The engine should idle smoothly without stalling. If the engine stalls, increase the idle speed slightly.

Tips:

* If you are not comfortable adjusting the idle speed yourself, you can take your car to a qualified mechanic.

* Be careful not to over-adjust the idle speed. This can cause the engine to run too fast and damage the engine.