Re: Low power c8.3 Cummins Reply #20 – December 16, 2014, 06:18:52 pm A leaky CAC or exhaust leaks would be my best guess. Any Cummins shop should be able to find any leaks. Its a common problem. Do you have an exhaust brake, PAC Brake? If so make sure it is opening all of the way under power. Restricted exhaust can dramatically reduce acceleration and power. Also make sure there are no restrictions in the muffler. Collapsed baffles can cut HP. Quote Selected
Re: Low power c8.3 Cummins Reply #21 – December 16, 2014, 07:17:46 pm I just had the Pac Brake go in my FL60.Turns out if you don`t use them enough they start to stick.Mine would stick in a partial closed position not allowing enough exhaust out, power was down depending on how closed it was when it stuck. Replaced with new upgraded Pac brake, 30% more hold back and wow truck seems stronger than I ever remember.Steve Quote Selected
Topic: Low power c8.3 Cummins