hey everyone... i recently gave my old 93 z24 to my sister. details are.. 3.1L, auto trans... 225,000kms... problem - on friday night she eft work and at a stop light the car lost considerable power and "chugged". now the car starts, runs and drives no problem but it seems to only be running on one cylinder bank (3 cylinders or at the most 4)... coil pack? you cna smell raw fuel in the exhuast.. its very noticeable. help?