I have a '96 acura tl 3.2. It has 128K miles. Recently my ignition coils went bad and the car started running sluggish with really bad performance so I replaced them and the spark plugs within a month. My car still has a sluggish/hesitant shift occasionally, along with light white smoke possibly steam from the exhaust. It comes and goes through the duration of driving. What could cause this? There is no coolant leaking through the head gasket fyi.