Ford Escort (BJ 97) “bollerts”

Hello, I just came back from my girlfriend’s parents and my escort already made strange noises on the way there. First of all, I noticed that the speed indicator (tacho needle) trembles strongly. Furthermore, the car “bollers” in the stand. The whole sounds like it is always “recharged”. On the way back everything was quite normal at the beginning. The speed indicator also behaved calmly. But something halfway (80km) started the whole thing again. reundin also meant directly why the car sounds so funny. But the whole thing only strikes in the stand. Only the tacho needle trembles. Since I still have the car very new, I can hardly judge whether the driving behavior is different. I took over the car from my grandpa. Up to now only 50000km are down. Data about the vehicle: Ford Escort Fun Zetec 16V 66kw (90hp) KM-Stand: approx. 50000 timing belts a year ago. Car was changed every year in the inspection (checkbook) Can me Any of you say what that could be? Greetings and Merry Christmas! Alex