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I ran hot shot in my CP-4 every tankful for about 3 years until they replaced the pump. I may continue running it again, but like you, I don’t really know. The article I gave a link to claims the replacement is a CP-3. I heard when a customer had a failed pump, they simply installed another...

So somebody came out with a software fix to extend the life of the CP-4. That’s interesting. I wonder how many people are running this software right now and is it only for the Eco Diesel? I swear my Ram ran slightly better with the CP-4. It develops more pressure and “on paper” it’s a better...

So far have put about 1000 miles on new pump. Towed heavy 6-8 times, too. Other than slightly extended crank times, everything is about the same.

I have a 5500 Aisin

Negative. Are they being recalled?

Well, that sucks. Why would they maroon a few 2019 owners… But at least Ram covered most trucks.

Maybe they did, but if you read the article, GM stuck customers with failed pumps, so did Ford. Tell your friend the 2019 Ram is listed to be factory repaired at no cost to him/her/

I am one of the “lucky” owners of a ‘19 or ‘20 Ram Cummins with the CP-4 pump. If you didn’t already know, these pumps are found in all 3 major brands of truck and across a few different models as well. As far as I know, Ram was the only manufacturer to offer free replacement of all affected...