1999dodge 2500 5.9 diesel starts right up, go to put in drive, dies. It also seems to be idling fast. Used to idle at 500 now 950 to 1000. I put my foot on break put in Drive go to push gas truck dies. If I push gas pedal fast and hard it will keep running and drive. Stop at light and because it's idling fast it feels like it wants to keep going. Once it's started it runs ok but runs fast.