my boy has problem with his Volvo s60 t5 . 5cly petrol,it drives ok but when its warm or over a short drive (or in is words it gets lumpy at 50mph}we me my boy are loocking for some tips. it has been looked at bye a garage with tech di instrument(plug in hand held brain) he is told by a mate (who wants to buy the car it could be it needs (five)coil packs replacing.we need contructive information ,sorry to be so blunt but what he requers is a informed diagnosis.from the little information I have given ,please no smart arse replies. at my age I donot need them .any suggestions are welcome I have read on omg that this could be the problem with oa mig . willlook at replies whilst swibo takes me on a dirty weekend to(donot pass out Skegness}.I offerd the rhine cruise & maimi but its skeggy. a may survie to thank you all ,swimdos 73 birthday present