2003 Windstar

2003 windstar 76,000 miles, everything was fine and all of a sudden it acted like it was running out of fuel, spit, sputtered, coughed and died. It restarted right away. I took it to the shop, they tested everything, fuel pump was fine but a computer check came up with several codes. It said the rev limit sensor was bad then the cam position sensor was bad, and at a dead stop it said the vehicle was going 128 mph. They cleared the codes ran another check and more codes came up. All of a sudden it started running fine again for about a week. It did the same thing again. I took it to the ford garage and they said same codes and running bad. They keep it for 5 days and couldn't figure it out. They tested the sensors and they check out fine. It ran fine when I picked it up for about a week and now it is dieing and running bad again. When I get it to run smooth for a bit then put it in gear it misses again, put it in park it runs ok sometimes. I put it in gear and it starts missing and dies again. What should I do?