my 1995 sti is misfiring on idle and on acceleration.i know this topic has probably been covered loads of times before but i really need help.i keep hearing about coil packs being a common fault but does my car actually have em?ive looked at various pics of coil packs that seem to be fitted directly over the plugs but my car doest have these.any suggestions or clues as to what to look for would be greatly appreciated.