Need urgent help

Hello, I drive a Seat Cordoba 6K, Bj 1998, 55kw and have the following problem So at the beginning (Tuesday) I started the car and it turned very high, which also did not go away. I then drove and he jerked during the driving strong (not continuous) I turned a few round and it did not go away. The next day in the workshop, have put in new spark plugs, set the ignition time, tried another ignition coil (used), spark control, temperature It was a bit better after that but not away. Home and a used distributor were installed and then it was much better, he only jerked when you turned in the 2 course under 2000. The next morning at the start he turned up to 1700 and stayed there, the speed did not fluctuate as on the first day. I started driving 5 km further he jerked again briefly and then was OK. 15km further the car went out at 70 kmh (speed down etc.) after 2 minutes he jumped again and I drove another 5 km until he went out again. This time it took 15 minutes until he jumped again. Passed then still more 2 times and then we put the old distributor back in place and we could drive back home wriggling without it going out. In the evening we have a completely new distributor built in….ruckeln is eig. away, but runs if it gets warm only on three pötten (sounds like a hitch and I believe a A bit of power loss) you go off the gas for a little while then he catches himself again. I’m really stunned and I hope you can help me.