After driving my vehicle for about 40 minutes, the engine stalls out on me. Sometimes it crank back up when when it does it the engine shakes badly and stalls out again. After that or during the times it won't start back up I'd have to wait a few hours to a few days before the vehicle is able to start again. This is a repeating cycle. I have changed the fuel pump, filter , and the crankshaft sensor. The problem was not resolved. An one has any ideas?