I have a 850 Volvo, 157t k, BJ 93 and for 1 year a problem that has not been able to fix a contract workshop, it is getting worse and worse. The engine does not take the gas properly when accelerating in the speed range 2-3000, the vehicle jerks. from 3.5 4000 revolutions it actually goes through again quite quickly. Top speed is only 160 kmh When I stand in the traffic jam or otherwise like stop + go the engine goes out and then does not bring any Leistu at all. This happened to me the other day in front of a parking garage, when I was finally inside, I almost didn’t get up the small slope to the next parking deck. Spark plugs, ignition cap, ignition coil, engine control, thermostat, bezin pump, Lamba probe, air mass meters have already been tested and exchanged. All cylinders were measured and found to be good. Oh, well, I have to mention that everything gets worse at high outdoor temperatures and full tank. I am really grateful for every tip Eva