I have a 2001 Dodge Ram 1500 3.9 liter truck. It has reoccurring P1391 , P0340 codes . Both sensors have been changed . Engine will run good for approx. 10 mins. Then quits . After it quits the dash gauges fluctuate and the fuel pump keeps running .Will restart after cool down .

 

Did you replace the crank sensor with a Mopar sensor, as the aftermarket sensors don't work particularly well. Also, did you move the distributor at all when replacing the cam sensor? If so, you will need to have the fuel sync reset with a scanner that can perform that function.