Why after only 54,000 mi. and no previous issue does vehicle SUDDENLY idle rough
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Week ago driving in morning (So. Fla.)alls well no problems. Garaged at 11 AM, pull out of garage 5 PM car starts fine but idles very rough & sputters down street with no change while accelerating (loud w/little power). Changed all plugs (old were not bad looking or fouled), cleaned all air filters & MFS sensor, added injector cleaner to fuel tank. Valve cover gasket was leaking & replaced. Rechecked plugs - no fouling or oil on them. No change, Still idles ROUGH w/loss of power.
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