Cummins 2005 ISL low power AGAIN!
What we thought was a sticking exhaust brake on our MH is now a, They don't know. The exhaust brake checked out good and functioning properly. $515.67 later and Cummins West thinks it could be a faul...
Forum Discussion
Hershey.....I think "jamesa403" may have miss typed some numbers. First, I've never heard of a 300HP ISL. There have been 370, 400 and 425 ISL's. His turbo boost number is also waaaay off. Most of the ISL's are doing about 29-31 psi.
