Cummins isb 6.7 b101 cm2350 dozing pump issues

[Rawze]

(02-03-2021 )joed2323 Wrote:  Yes I have it. From what I'm being told I need fords wiring schematic not cummins.

I'm also noticing the def fluid dosing valve commanded position open/close more then I originally thought. Its very fast when it switches from closed to open but this can't be correct. It should stay open when the diesel exhaust fluid dosing state is "dosing "
This is gotta be my issue, but why?

sign up onto quickserv ... follow thru these procedures and look for things that may be bad...

https://quickserve.cummins.com/qs3/porta...n/2883567/

and...

https://quickserve.cummins.com/qs3/porta...n/2883567/

and...

https://quickserve.cummins.com/qs3/porta...n/2883567/

Look for old hoses or air lines that may be leaky, etc.

The programming for the doser valve shows that the valve will not open unless there is at least 36 psi of "Air Push" pressure at the pump. I don't own one of these trucks, so I am not sure what they are referring to there. Programming also says something about 2 seconds on-time and 20 seconds off-time as the air purge cycle. Maybe what your seeing is this cycle repeating itself? .. unsure... just poking at it from the 10,000 foot viewpoint.