I have an '03 2500 reg cab 4x4. I have 32,000 miles on it and I changed the oil and oil filter and the fuel filter and now I am haveing an idle problem. The truck runs ok when you are going down the road but sometimes while idiling it shuts off. This is an intermittent problem. It starts ok everytime and runs ok. This problem will occur out of the blue. There is no rhyme or reason why it does it and there is nothing I can do to make it do it. It started after I changed the fuel filter. I went from a hastings brand to a napa brand. I took it to a Dodge garage and they said that the lift pump had been redesigned and they moved it from the frame and put it in the tank. That did not help. They don't know what is wrong with it. It has done it right after a fresh start up and after I have drove it down the road 50 miles. I have checked the o-ring to make sure it is ok and not sucking air. It is ok. Help please...

 

I'd check the Forum dedicated to the CTD.