Hi people, have the following problem with my arosa:Seat Arosa 1.0 MPI BJ: 10/2000 Engine code: AUC km: 120000 The yellow motor lamp is on now and then! –Then read out the error.ZYLINDER TUN EXHIBITION 3 I had the compression checked. Result: 3 cylinders full compression and one (cylinder3) has only about 60-70% of the compression of the other cylinders. The car runs only idle. However, from approx. 2000-2500 revolutions everything runs normal again. Since anyway an oily Since 3000km was overdue I did a 5w40 instead of the usual 10w40 (which was in it before) So. maybe thought of cylinder head gasket (HORRORschock- bin Studi). wouldn’t then have to leak some oil or cool liquid? The air filter is clean and otherwise I don’t see any oil leak or cold liquid loss. Incidentally, the whole thing started at the same time as the death of my end pot. (I drove around about 1000km with a big hole in the end pot). Endpot is now new. What would be the first possible causes of error? Wouldn’t want to have to remake the valves for 1500 euros without being sure that it’s because of it. Please keep helping me… the car has to last another semester and then I have to find a job before I can treat myself to a new car. Should the worst be assumed in case of compression loss on cylinder 3? *heul* if you need more infos, please let me know quickly. so to speak, live in this forum and eagerly await your opinions.