Have a problem with my 4.5 year old 172 (21,000 miles, FRSH etc). Just started juddering for no reason and lost all power. RAC came out and plugged their computer in and couldn't find any problems, no warning lights etc. RAC towed it upto Renault who advised there was a £45 + Vat per half hour diagnostic fee. They called back later in the day to say that they have been on it for an hour and can't find any faults (although they agree there is something definately wrong!!) They wanted authorisation to spend another couple of hours attempting to diagnose the problem (so another couple of hundred quid). Obviously my hands are tied as it needs to be fixed. Any thoughts or anyone had similar problems??
Thanks.
Thanks.