Hello, we have recently had massive problems with our V40 TD, 66kW, engine D4192T, the good old Renault engine F8QT, BJ 01/98. When starting cold, let it rotate for a long time until it starts. Ok , you can live with it. The idle speed is too low, between 600 and 700 revolutions with cold engine. Then it does not keep the speed right, it varies constantly by approx. 100 rpm. With warm engine it commutes between 850 and 950 rpm. When switching, you have the feeling that the car does not have any light. g has more, only when the turbocharger gets enough pressure it finally pulls, before it drives like a 34hp-fiat-panda with tightened handbrake. Even with constant gas the car has drop-outs, i.e. it jerks from the engine, as if it pulls false air or pulls air over the diesel line. (Similar to ignition-slips…) or not get enough diesel. If the car then accelerates and one keeps the accelerator on the highway under good load it drives itself quite standard al, but for city traffic and highway this driving behavior is really annoying. Diesel filter is new, it can’t be because … Does any of you have an idea ?