Hello, I would need your help with an error analysis. I have a Seat Ibiza 1.4 petrol Bj. 98. The car had an engine damage, due to overheating. Someone then built me a used engine (from the junkyard). Unfortunately I now have the problem that when braking at low speeds so mainly when I almost get to the stand the car runs out. That does not always do this, sometimes the rotation numbers also swing up and down and then commute at 900, which In addition, I noticed that the tacho needle sometimes hangs, as if it were stuck in the 0Kmh place, but at some point it moves. The man who built in the engine meant I got through the first damage, oil and water in the cat and had to drive for a while until the going out settles. I drove now about 150 kilometers and would claim out of the belly it has become really less with the going out, but it is still there. I did not have the structure again. Hl my car wouldn’t pull right, which would be the case with dirty cat, as I was told. The engine is running very well, also in the stand. I’m struggling if I had to do something again. The car is not much value even if it was still right, but would have some relatives who could do this to me or others on the car. No one knows exactly where that is with the car.