I have a 2006 Ford Ranger. It died on me while driving on the highway. It would turn over but not start. I took it to a shop and had a diagnostics test run. I was told the fuel filter was clogged. I had it replaced. ($100) A few days later, the check engine light came on and it died again. I was told this time the fuel pump relay was not making contact. I had it replaced.($55) A few days later, the check engine light came on again, and it died again. At this point I was told they could not determine the problem, but it was probably the fuel pump or inertia switch. The fuel pump was pulling the right amount of amp-age, and the fuel pressure was good. All indications were good, and the dying of the truck could not be reenacted. I had both the fuel pump and inertia switch replaced, and it has been 3 days, and the check engine light has come on again, this morning. I don't know what else is left to fix. I will take it to an auto part store to determine if the check engine light is related to the fuel system or a separate problem, but if it is in fact the fuel system, I have no idea what else to do. Any help would be great.