PLEASE help me! VNL670 with an ISX CM2350 4.4 MPG!

[VNL670]

(06-26-2018 )DLC Wrote:  One thing I tell guys to do is to take a windex(spray bottle) filled with some dish soap and water and spray down all your intercooler connections. Rev engine to 1200rpms or so and spray all your intercooler connections. I find leaks on most of the ISX/QSX equipped machines I see. IH trucks are bad with their shrink clamps. I'll spray down intercooler too but haven't found any leaky ones yet. It may not be your silver bullet but it's easy and cheap to do. Someone will chime in and say he's got lots of boost and won't have a leak don't bother checking. Please just check and there's one thing off the list.

That is actually going to be my next move. I am going to do that Monday or Tuesday to make sure I'm not losing any boost.