Hi I have a 2001 ram 2500 5.9 Gas automtaic and I have had a ton of wierd problems with this truck lately it would not start so I replaced the cam and crank sensors the one in the bell housing and the one in the distributer among other parts Now it starts and runs but it runs absolutely terrible I mean bucking and and spitting it is terrible until it warms up as soon as the thermostat opens it runs fine and it throws the p1391 code? I am hoping someone has had this problem or has some tips

PLEASE HELP thanks

 

my dodge 5.9 would die only in R now it is doing the same as yours! i am a mechanic of 25 years its been to the dodge house no codes they say nothins wrong with it??????? so i am going to join everyone i can with the same problems we may find the solution.

 

I will move this to the 2nd gen ram section (1994-2001 Dodge Rams) and get you some help.

 

have you tried the IAC? clean it out see if it helps.

 

P1391 Interm Loss of CMP or CKP

Where did you get your cam/crank sensors from? The parts store? Our trucks HATE those. Get them from the dealer.

 

I have a 99 dodge ram 1500 5.9. When i drive the truck when it gets heated up every one in the while when im slowing down my truck will die. Some times it will restsrt right away other time it takes a dew min. It does it with the ac off which i beleive eliminates the idle air control valve. Theres no active code but it has a pending 1391 loss of comshaft. The camshaft position cencor and idle air control sensor was replaces back in march of 15. Would that cam sencor be back again and would that cause my truch to shut off? Would tbat fix the problem? Please get back to me with any info. Thank you

 

Check my post above yours. That code is for both cam, and crank sensor, if you have already replaced the cam sensor, time to replace the crank sensor. Get a good one. Don't bother with duracrap. Dealer part is best, but, they are pricey.

 

That codes for crank and cam shaft?

 

Yep, makes life interesting.

 

I have a 5.9 in a 2001 Durango with a 1391 code. It was intermittently missing at all speeds and then stalling, like it ran out of gas. I wanted to add what I learned to help the discussion. The 1391 code is intermittent loss of signal CKP (Crank) or CMP (Camshaft). The camshaft sensor is in the distributor and the Crank sensor is in the transmission bell housing behind the right cylinder head, under the transmission fill tube. There are other codes that may come on with either sensor and in that case the engine may not fire at all. (P0335 - P0339 CKP or P0340-P0341 CMP) Mine was only 1391 which could be either. I took a chance that it was the crank sensor based on the number of complaints on the forum. Not exactly scientific, but it was the correct guess. Intermittent problems are more difficult to define.
I eliminated a low battery problem by unhooking the negative cable after starting to see if the miss would go away and it did not. I also checked the fuel pressure on the injection rail to see if it was stable. The pressure fluctuated with the engine miss but I was not sure if it was a pressure problem or just caused by the miss. Since I had a code I went with the crank sensor.
Like I said the crank sensor is right behind the right cylinder head. You have to take off the plastic fender liner on the right front wheel well to get at it. I will try to post a picture so you can see it. the bolts have a 15mm allen head or 12mm socket. Use the allen head because the bolts are so close to the head you cannot get a socket on the upper bolt. I was cussing the Dodge engineers until I noticed it had an allen head. You have to use a wire to fish the connection wires up the back of the engine to the plug which is by the distributer. Also loosen the ground wire and spin the wire clockwise to get it out of your way. I think next time I am going to buy a full size truck. At least you can get to the broken parts easier.