Attention: TDR Forum Junkies 
Have been doing some searching here and haven't found this same problem, so I am going to take crack at describing this and see if anyone has had this happen to them.
Back in February I had a lift pump failure, the truck had 300k on it and still had carter pump on the side of the filter housing. The shop I had it towed to had a FASS DDRP so I told them to just put it on. I drove the truck about 500 miles after that with no problems.
Then in April I took a trip to TN, I got about 40 miles from home and when getting on the interstate the check engine light came on, the truck seemed to run fine but when I got into the throttle pretty hard the tach jumped all over the place, I stopped at the next exit and read the code, (P0341) I drove to the next Dodge dealer and bought a new Cam/Crank sensor, it was raining and nasty so I just drove on, I drove 900 miles there and 900 miles back home with no problems except the tach jumping.
When I got home I did replace the cam sensor and cleared the code, but on a test drive the code promptly set again, now the story gets stranger, when it started getting warmer this spring and I started using the a/c whenever I get into the throttle and the tach starts jumping the a/c quits working and sets code P647,(A/C Clutch Relay Circuit High Voltage) if I turn the a/c off for a few seconds and back on it works fine until I hit the throttle again and the tach jumps then a/c quits again.
I don't know if the FASS pump being installed has anything to do with this but it has been the only thing done to the truck in a long time so I thought I should mention it.
Sorry for the long post but I wanted to make sure I got everything explained as best I could, I hope some TDR member much wiser than me can shed some light on this gremlin.
Thanks,
Tim
Back in February I had a lift pump failure, the truck had 300k on it and still had carter pump on the side of the filter housing. The shop I had it towed to had a FASS DDRP so I told them to just put it on. I drove the truck about 500 miles after that with no problems.
Then in April I took a trip to TN, I got about 40 miles from home and when getting on the interstate the check engine light came on, the truck seemed to run fine but when I got into the throttle pretty hard the tach jumped all over the place, I stopped at the next exit and read the code, (P0341) I drove to the next Dodge dealer and bought a new Cam/Crank sensor, it was raining and nasty so I just drove on, I drove 900 miles there and 900 miles back home with no problems except the tach jumping.
When I got home I did replace the cam sensor and cleared the code, but on a test drive the code promptly set again, now the story gets stranger, when it started getting warmer this spring and I started using the a/c whenever I get into the throttle and the tach starts jumping the a/c quits working and sets code P647,(A/C Clutch Relay Circuit High Voltage) if I turn the a/c off for a few seconds and back on it works fine until I hit the throttle again and the tach jumps then a/c quits again.
I don't know if the FASS pump being installed has anything to do with this but it has been the only thing done to the truck in a long time so I thought I should mention it.
Sorry for the long post but I wanted to make sure I got everything explained as best I could, I hope some TDR member much wiser than me can shed some light on this gremlin.
Thanks,
Tim
