I had the same issue almost a year ago on my SRT with 8,000 miles. I was driving around 40mph and car died. I restarted and limped home. After consulting this forum I decided to change out the CPS.
After replacing it, I started the car and it idled roughly just as before. I installed the old CPS and keep the new one as a spare. I also replaced the battery which was original, as that was offered as a possible problem. That however did not cure the problem.

I counsulted the forum again and I did the RCM solder repair and the car has been great for almost a year. I don't drive it alot but I have not had one miss or stumble of the engine. I assume it is fixed. I have taken it for one approximate 2 hour drive with no problems.