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Topic
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My focus is idling a bit rough when warmed up. It makes an intermittent rumble inside (vibrates the steering wheel and everything) it only does it for a second them stops and repeats. This only happens when the idle drops to 750 after the car is at running temperature. I cleaned my throttle body, changed my air filter and changed my spark plugs. My valve cover gasket was leaking oil into the spark plugs so that was replaced too. Is there anything else that may cause this problem??
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Those cars are bad for front engine mounts failing. (pass side of engine)The mount gets weak and can cause a bad vibration while idleing especially in gear. I take a piece of 2×4 and place it on a floor jack and roll it under the oil pan. Jack the engine up very slightly. Start the engine and see if the vibration has changed. If so the mount is weak.
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