I have a Renault Espace 2.0T. The air intercooler pipe was broken at the connection to the turbo. I then bought a new one and the mechanic changed it for me. But he also serviced the car with new oil and spark plugs.
Now the car has a misfire when reaching 55 Km/h. So I put back the old spark plugs and had the ignition coil changed as well but this did not solve the problem. Any ideas what is causing the misfire. Thanks a lot.