Ford Taurus rough idle and clicking noise at complete stop with possible valve cover spring issue on Ford Taurus

Some Ford Taurus owners report experiencing rough idling and clicking noises, particularly when the vehicle is at a complete stop, which may indicate a problem with the valve cover spring. Symptoms associated with a broken valve spring include rough idling, loud engine noise, and vibrations coming from the engine bay. Additionally, some owners notice misfires accompanied by a check engine light, as well as loud rattling noises from the valve cover. In more severe cases, the engine may run extremely rough, stall, or produce loud knocking noises and shaking. A ticking or tapping sound that worsens at higher RPMs, along with excessive valve noise while driving, has also been reported. There is a risk of severe engine damage if a valve spring breaks, so it is advisable for owners experiencing these symptoms to have their vehicle inspected by a qualified mechanic.