Power loss, low boost, no warning lights
I've had something similar happen today, though not sure the explanations quite fit the problem so thought i'd see if anyone could provide any insight?
After doing about 60 miles on the motorway i was stuck in some slow traffic for a while, once that cleared there was a noticable lack of power, and the "boost" guage couldn't seem to get about the halfway point. Turning the engine off and on seemed to sort it but it came back again quickly. It was driveable, still managed to get up to a decent enough speed, but no acceleration at all. No warning lights of any kind to give an indication of something being amiss.
Car is a 59 plate 2.4 diesel, had the dpf removed and remapped when i bought it a month or so ago. Drive mainly country roads, not that many short trips at all. Any help would be brilliant, would rather not go back to the garage unless its a genuine problem...