It is looking like I am going to need to replace the engine in my mazda mpv, 2004 van. I know the coil paks are expensive to replace, and was wondering if they are part of the engine or a seperate component. I am thinking I am better off just saving up for a new vehicle at this rate. :/ I still owe 2.5 K or so on it and am not done paying off the water pump replacement. Opinions, please? Also still having problems with it misfiring when I drive because water gets in the coil paks.