Rugging and loss of performance

Good morning together, I just got out of the vacation and found a problem on the return journey from the airport to home. This problem also has a history: When I was about a month ago on the way to work, my car started to jerk and lost power. The car did not take any more gas, the speed decreased to a standstill and the car went out immediately when the clutch was pedaling. Although he had to start again after a short time and accelerated first normal, but already after a short time, symptoms repeated themselves o.g. Symptoms until the recumbent. I decided to pull a yellow angel and let myself be dragged to the nearest workshop. In this workshop, the following works were done: – Set valves – Change fuel filter – Change prefilter (at the tank) The latter has allegedly sat down and should have been the cause. The car then moved very little again until I just got back from the vacation and repeated myself on the home path. This time I did not get any help, but rather took the break with some forcible signs.