my sisters been having problems starting her t reg 1.2 8v clio RN, she has had the car for about 4 months and keeps saying it wont start, ive looked at it several times and everytime its started no problem for me, shes on holiday at min so i thought id go start it up, only bin lay up 4 days and it wont start, engine spins over but doesnt even attemp to start, i locked and unklocked the doors a few times with fob but still it wont start, i opened the bonnect to check if it was getting a spark and pulled a lead off and put a spare plug in the cap and got my mum to spin it over and it started right up, so i put the plug lead back on and it wouldnt start again, took it off and it started, then put it back on and it started and has continued to start since, any idea's, im begginning to think summit to do with immobilizer(if fitted???) or faulty ignition switch, any help greatfully recieved