Boost gauge, turbo cough

[DKenworth]

(10-12-2017 )DDlighttruck Wrote:  I bought a teltek boost gauge to replace what was there. It has an airline fitting on the back of it. Recommendation on where to tap into to feed the airline for the gauge?
'05 9900, CM870

Turbo cough. What is it exactly? I did the EGR tune up a couple months ago but I still have it once in awhile. Usually downshifting.

When is a last time you changed EGR back presure sensor, the one located by coolant termostat, could be that sensor is bad.