Hello,I have the following problem.The Fiesta pulls very badly,uses forever to get into drive.On the highway it runs only about 100-110 top. Spark plugs, petrol filter, air filter are new.My friend suspects that the piston rings are stuck and have to be renewed.He measured the compression and on the first cylinder was only 3-4 bar, second and third 4-5 bar and fourth 10 bar.A colleague of mine thought that the ignition or ignition point could also be adjusted? is also clean.Who has had similar problems and can give me tips what he would recommend ?Many thanks in advance.Gruss A53