tech one other question: when I changed the plugs this summer I acidentally tore the boot part of one plug when taking it off. I sealed it, and wrapped it in electrical tape. But nothing's happend till now. Do you think there ,might be odd chance thats what causing my stutter/jerk/missfire problem? when it tore, i could see the end of the wire that snaps onto the plug.... when i misted every thing good at night i did not see no sparks.. I would have repplced the wire, but im 2 hrs from nearest parts store and kinda forgot about that till now ;P