6.7L Cummins VS 6.7L Cummins HO
For those of you that have towed with both the High Output Cummins and the regular Cummins was the HO worth the extra $2800?
Forum Discussion
Me Again wrote:
Lets see, GM went to the Desmo pump as the CP-4 pain was to much for them. RAM reversed back from the two years of CP-4 failures. Saw a new 5500 with 9,500 miles with failed CP-4. Guess who still uses the CP-4?
Here is a picture of the 5500 being unload at RAM dealer.
We now know the CP4.2 pump doesn't tolerate air in the fuel especially after a fuel filter change and guess who didn't use a lift pump?
Cummins used a asymetrical CP4.2 pump and they were failing like crazy and tried to switch to a symetrical pump but it was too late. Guess who doesn't use a asymetrical pump?
