Originally Posted by Lloyd in S.C.
Not much info in your post? Year?
The 400ISL don't have a waster gate. It is a variable geometry turbo. You mention manifold? Exhaust manifold? Has the turbo been reinstalled?
His profile reflects a 2004 American Dream. Very possible this is the CAPS era ISL, not Common Rail with Variable Geometry Turbo. Only way to know for sure, is to have the build checked vis SN with Cummins.
I know this how? Well a bit sheepishly, I admit I drove our coach for well over a year, before a conversation with Cummins Tech Support on another issue, revealed my coach had the CAPS era ISL. The engine was built in July of 2003, and the coach was built in Sept of 2003, as a 2004 model year. It was on me, to validate that I was getting the newer engine, that I desired.
X's 2 on going in and getting it tested with the computer reading codes.
Please circle back and let us know how it tuns out. And, best to you,