pack failure is a typical fault on the Mk 1 clio, Ph 1, 2 and 3. Obvioucly yours is a Ph3, bug eye model.
To be honest if the
pack had failed it would not run or start at all, as it is the
that distributes the sark to all plugs, and I ahve never heard of them not sending spark to only 1 plug before. they are a sealed unit and I have never heard of them goin as I say on only one plug, only all 4. The replacement
pack can be bought from any motor factors, like Halfords.
Personally I would pay the £30/40 for a proper auto electrician to look at it first, they will identify the problem in seconds. They usually charge around £30/40 to come out and the first half hours time.
pack will cost you around £25/30 from halfords if this is indeed the problem. It may be as Nationwide said, a faulty lead, and they advised you to rpelace the
pack as a precuation.
Ring an autoelcetrician out first to save you time and money, you could replace 100 things before you get to the root of the problem.