ScottG wrote:
The turbo is always called for, that is it's always working making boost even under very light throttle because the exhaust is always going through it and spinning it. Even at idle it may make enough boost to make the needle sit just above zero. If it doesn't read anything unless you stomp on it then something is wrong.
Scott I'll respectfully take your word for this as I'm not a diesel tech. I have had my current unit for 9 years now and my gauge rests at zero absolutely at idle as well as highway cruise. I watch all my gauges so I'm quite sure of this. It will jump only under a hard acceleration. I mostly baby it so I rarely see it move.