I have a 2003 Dodge Ram with a Hemi that abruptly stops running after about 15 minutes. No engine light, no detectable loss of power, no lights of any kind, it just shuts off. When you try to restart the engine it turns over and it may stumble a little like its trying to start, but it won't. If you let it sit five to ten minutes it will crank back up and run fine for 30 seconds to a few minutes and then it stops running again. There are no signs of overheating. If you let it sit over night it will run for fifteen minutes and then shut off again. I checked for codes but there are no error codes. I read somewhere that a bad cam position sensor can cause the shutoff without codes, so I replaced the cam position sensor but that didn't fix the problem. I'm stumped. Anyone have any ideas?

Thanks

 

welcome to the site. first thing i would do is check the battery and acid level, then check my electrical and ground connections

 

You think its could be electrical? Everything continues to work on dash, radio, AC of coarse it stop blowing cold but the fan continues to run. The engine just stops running.

 

Im 99% its electrical

 

I'm with weedahoe. Check all grounds. There should be five. The first two I would check would be battery to block and block to body (hence the heating up). If you've had a stereo or hid lights installed or made any electrical changes check them first.

 

I'll check them all today and let you know how it goes. I put in a new battery a few months ago. Other than than no changes since it was new so I'll be sure to look at that too.

Thanks

 

also check those connections at the PCM and on the bottom of the PDC

 

So I found three or four on the fender drivers side including the one from the battery, one on the fender on the passenger side fender, the one from the battery to the block, one high on the firewall on the passenger side and one that is low on the firewall almost under the passenger floorboard. I removed them and shined them up with some sand paper and\or the Dremel. Still no luck but I think you may be on to something on the grounds and the PCM. I read somewhere somebody else was having a similar issue and it was the ground causing the PCM to shut off. Didn't see it so I'll have to go back and find that along with engine to frame ground. I was expecting a large braided ground wire from the engine to the frame but didn't see anything. Any ideas where it is located. Thanks for all the help.

 

I'm co-signing on everything weedahoe said. My 03 only has one small braided ground between the cab and bed. The others are coated copper. Being and electrical issue can mean anything from a bad fuel relay to burnt out wires that can only be seen by stripping off the coating. I personally wouldn't waste time by not using a volt/ohm meter. You can have the meter on while the motor is running and check for a voltage drop at each sensor or pump.