This is my 91 S10, 4 cyl. engine 110k manual, no options (not even a radio). A couple of weeks ago, I was driving along and it started chugging, lost power and finally died. It started again after about an hour. I replaced the fuel filter (which the previous owner had never done) and it doesn't chug now but it does drop dead after about 2 miles. The SES and battery lights come on a second before the engine dies. It idles and runs fine up until it dies. My neighbors are tractor restorers and they checked the spark plugs & wires, battery and connectors, listened to the fuel pump and pulled codes- just gave 12s no other codes. Any ideas?