I have a Renault Scenic 55 reg 1.6l petrol. It has develeoped what feels like a misfire at around 2-2,500 revs. Below and above that range the engine runs well and pulls hard to the red line. When it misfires there is a noticeable vibration from the lower front end of the car.
Engine diagnostic shows OBD code P0300 - random multiple cylinder misfire. Plus P0340P as a provisional code - Camshaft position sensor malfunction. Plus the usual "check emmissions" warnings
The misfire has to effect more than 1 cylinder for this code to appear. Plugs, leads, coils
could be to blame but before I start random replacements of parts i wonder whether anyone else has come across this type of fault. Cheers.