Well the other night I replaced my cap and rotor and every thing went just fine. About 15 miles later, the stupid cel went on and it ended up being code 9(cylinder position sensor). My car will run real lumpy at idle but if I turn the car off and then back on, it is fine. Besides the idle problems, if its not running right it will jerk a little when I give it gas after I let off...anyone else ever had this problem? If yes how did you fix it?