I was in the drive thru and i turned off my truck. went to start it and it took awhile to start. anyone have any ideas. I have also have a probelm when i run the a/c on high and come to a stop the rpms drop to 600 and the oil pressure drops to 0. as long as i put it in nuetral it is fine. could this be something with the fule pump? i dont have a problem starting my truck when it is cold.

 

Sounds like your idle is way low.

https://www.dieseltruckresource.com/...d.php?t=165710

 

where and how do i do this

 

Did you see the above link?

Anyway, here are the directions:

http://www.dodgeram.org/tech/dsl/adj...d_Gen-Idle.htm