I have a 00 ranger and i am having a problem with my truck. For the last month or so my truck has been running weird. I changed the camshaft, crankshaft, iac, and mass air sensors, and 2 tuneups. At a light it will act like it is miss fireing a lil like every few sec, like a stumble. Then when i drive it like 20 miles or more, on the way back i will accelerate and it will start stumbling like i let of the gas but i dont, then it will finally shut off and i cant get it started up again so i have to reset the computer. Can any one help????