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the 84 uses an idle air control valve to control idle speed. this is a function done by the computer. if the idle is too low when cold but runs ok when hot, or ok when cold but then too high when hot, then chances are your idle air control valve is bad. if the idle is high all the time, you probably have your pcv valve vacuum line disconnected. if your brakes seem very hard to push as well, then it's probably your brake booster vacuum line. if neither of those, look for other vacuum hoses that may be disconnected. there is no user adjustable idle speed control for that car.
What else can I help you with?
How do you adjust the idle on a 1991 Chevy Corvette?
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How do you adjust idle on 1984 ford escort?
At the base of the carburetor are 2 screws. One adjusts the idle speed and the other adjusts the idle mixture. Screw the idle mixture in until the engine starts missing then screw it out 1 turn. Then, adjust the idle speed screw to about 850 RPM.
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On the driver's side of the F 150 carb, there should be the linkage for the throttle. On the linkage there should be a set screw that you can turn to adjust the engine idle.
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To adjust the idle on a 1984 Mercury Capri, first ensure the engine is at operating temperature. Locate the idle adjustment screw on the throttle body; this is typically a flathead screw. Turn the screw clockwise to increase the idle speed or counterclockwise to decrease it, aiming for the recommended RPM specified in the owner's manual. Finally, check the idle speed using a tachometer and make any necessary fine adjustments.
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The cause of high engine idle and surges in the 1989 Corvette is due to..Read More
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