My s10 became harder and harder to start to the point that I needed to jump start it off another running vehicle, even though the starter, battery and alternator are brand new. Also replaced are the engine sensors, coil,piece bolted to the coil (forgot the name), plugs, dist, dist cap, plugs, recent fuel pump, fuel regulator and spider.Problem seems to be spark related, once started it ran great and wouls start up over and over until it cooled down for 6 to 8 hours, then needed to be jumped again.