I have a 1991 Plymouth Voyager van that suddenly stopped after I bumped into a curb with my front wheels rather hard. I immediately tried to restart it, but was unsuccessful. I checked at the fuses and they are good. It has a 3.3 liter V6 engine. I measured the resistance of the DIS pack and found that the measurements were are within spec. I purchased a spark tester and it indicates there is no high voltage to the plugs. What's going on? What drives the coil pack? A computer? or relay?