Hello, I was looking for some help with a question i have. I own a 2003 dodge ram 2500 cummins. the truck has 50,000 miles on it. Heres my question. It seems that when i am going up hills and giving the truck gas it will get to a certain point and its like it looses pressure/ power. other than that the truck runs strong until it hits that point. I talked to the dodge dealeship about this and they told me to chek and see if all my hoses were clamped tight, which they are. He also said that it was just hitting the rev limiter. Any help or advice would be appreciated. Thanks

 

The normal RPM operating range for ISB suggested by Cummins is from 1600 to 2700. The torque curve is pretty much flat across that range, then begins to drop off. The rev limiter hits at like 3200 RPM. 3300 RPM is maximum no-load.

 

Is your truck an auto or stick? If it's an auto, the torque convertor unlocks when downshifting.