larabeejj

I had a snap on machine monitor the injection pump , it showed fuel solenoid shutting off in injection pump. So I guess I have a bad vp44.

I have replaced batteries about a couple of years ago and cleaned grounds as well. I can have them checked out for sure to start with the simple things. I got a buddy with a Genisus can tool he said he can read all the codes and check all the sensors while driving so I am gonna try that as well.

I have 2001 cummins 4x4 6 speed with 172K on it. I have had this truck for 7 years, upgrades are quadzilla adrenaline, k&n, straight pipe, air dog II. About a year ago I thought I had a water issue driving on a 1400 mile trip on interstate 40 my truck started jerking at around 55-60 mph like it had water in it. Everything would go dead and then pick back up, nothing of consistency, let off the throttle and then back on it would respond then start doing it again bucking and snatching. It got so bad I had to turn chip off. I put RPPF fuel treatment in it and it seemed to clear problem didnt have any trouble with the rest of trip but every now and then it seems to do it on long steady driving with accelerator at a constinent position past 55 mph. I did replace throttle positioning sensor before this because I was getting a code to replace it. The problem has came back now a year later but seems to do it more when I drive on intersate and start gettting around 70 mph, it gets so bad it wont let me go aboe 55-60 mph on interstate. I have no codes showing up. I have replace filters drained fuel tank, unhooked quadzilla chip and still does it. The VP44 was replace 5 years ago but I figure if it was that I would get a code. The injectors are stock and have never been cleaned except the additives sold to put in fuel. Anybody with some recommendation would be of great help.