I have a 98 Ram Van 1500 with the 3.9L, 3 speed auto with 3.55 rear gears and ever since i’ve owned the van it always had a no bus code, it never used to bother me until it started stalling, first it would only stall under half a tank and now it does it whenever it feels like it now it’ll stall idling, or going 70mph it will just stop and wont start back up for another 15-20 minutes i’ve replaced the dash, all 5 sensors, and the pcm and it still has a no bus code all the connections don’t seem very dirty, majority of the time it will stall once while driving and won’t do it again unless idling

 

Which sensors did you replace?

 

The "no bus" message indicates a loss of communication between the cluster and PCM. Usually, one or the other will have to be replaced, and if replaced with defective used ones, the issue could still persist. The stalling below 1/2 a tank is due to a failing fuel pump. Since the issue has gotten worse, I would have to say, so has the fuel pump.

 

That’s what i believed too because the gas gauge would go empty randomly, but it loses spark when it shuts off by itself and if i crank it too long it takes longer to start so i’m thinking it’s flooding the engine

 

I replaced Cam, Crank and Map sensor plus other 2, cannot remember all of them but i read somewhere if one of those sensors go bad it will cause a no bus issue

 

Anything on the 5 volt bus going bad can cause a no-bus error.... which is basically every sensor on the engine/trans/exhaust..... Rear O2 sensors are famous for this. Not just a bad sensor, but, the wiring gets in the wrong spot, and melts..... Sometimes...... you can find the culprit by unplugging sensor when the problem is present, one at a time, and see which one you unplug brings the cluster back.

 

The cluster still works, nothing seems off besides the occasional fuel gauge going to empty but that hasn’t happened in months, the issue is the stalling and if it sits for a while it won’t stall but the more i drive it the more it’ll stall even more, was 20 minutes late to work because it died out 4 times on a 20 minute drive and it’ll only start up by pumping the gas after 10 minute wait

 

Have you cleaned the throttle body?