misfire can be cause by bad spark plug, bad wire, or bad coil (depending on your year).
i dont know what damage could happen but i would get i fixed.
__________________
1999 ranger 4x4 supercab, 4.0L
-3 inch PA body lift
-16 inch pro comp alloys
-33x11.50 BFG all terrain
-Go Rihno roll bar with 4 KC Daylighter lights
-weston bull bar
-dual exhaust,
-air box mod, tightend throttle cable.
|