Hello have bought me a Clio Bj. 92 with 75 Ps. The cylinder head gasket was broken and was driven with it still a few km. Head gasket I renewed oil and filters are also new. After the assembly it ran only on 3 cylinders. Ignition sparks is there with all cylinders Also compression has it evenly. Only unfortunately it does not run round, exhaust bubbert something. What can this be about? About fast and helpful answer I would be very happy.