WHEN A REALLY GOOD TWINGO WORKS IN FRANKFURT

Hello, I have had my Twingo year 2000 , 60hp C06 now over a week in the workshop and without trouble and a lot of money (500 Euro) the car now at least as I brought it back. The actual problem has not been found or fixed until today, because it still does not move properly at the final speed. Here I fluctuate between 120-139 Kmh and this even on a straight track without headwind with long start and give some feeling at the gas… What was so far a lles made: spark plugs changed air , oil and petrol filter renewed water pump , timing belts ,clamp roller valves Discontinued New wheel bearings front 2 built but functional joint shafts front tap sensor 2 times oil change engine cleaned in the range of valves because heavily muddy also further sensors , it runs quietly, does not race anymore and jumps immediately! The compression should be sufficiently good, however I had a white oil cover which is yes for humidity s pricht… I can’t and don’t want to put so much money into the car anymore and just want to know why he doesn’t move and where I can have this done in a workshop has the idea that you can trust and that doesn’t take away all my saved away! Otherwise I have to sell the Twingolaider and regret it very much that somehow no one really has a plan and can just call me a good free work place that can help in the Frankfurt area gladly and well! I’m really totally frustrated and k I’m a little out of my mind… yet thank you for every support!