my gti is playing up again changed crank sensor in may 06 then 3weeks ago it started playing up again i have over last three weeks changed relays 30+167,new coil,cleaned thottle bodie out with carb cleaner.i havent driven it for 3weeks ive only had it idling on drive way.it will run for about 15mins and then cut out teperatures between 52-64 degrees.i dont know what else to try have u guys got any other ideas please.hall senders how much r they and where r they cheers once again