konichiwa... about 2 weeks ago i found out that my car was misfiring only at idle. i scanned it for a code and it said that cylinder 3 is misfiring. i have replaced spark plugs and wires, also replaced the ignition coil. and there was oil on the spark plug in the third cylinder, so i also replaced the valve cover gaskets. to this day the problem happens not as often as it did but i still get the vibration and roughness only at idle. when i accelerate everything runs fine, smooth and powerful. any idea's, the mechanics i work with are stupid, their no help. anything else i should try?