I have a 95 ranger, 4X4, ext. cab, 4.0 V6, with 200,000 miles. It had sat for almost 9 months when I bought it. After purchase I changed the gas, fuel filter, and fuel pump. It ran several times when I decided to take it to another location to work on it more. Shortly in to this 2 mile drive the truck began to smoke and miss. By the time I had finished the drive the truck would not run without my foot flat on the floor. Even then it didn't get much above 1200 rpm's. It then began to worse and will not even start at this point. I've tried to start it without touching the pedal or with the pedal on the floor. I've check that it is getting air and I removed the front driver side spark plug to insure it is getting spark. I put some B-12 chemtool in the tank, and still can not get it to start. I'm at a loss. Please help.