Hi There!
This is the first time i have used this site and wanted to say hello and find out if any other carisma owners have had the same problems as me.
A few months back i found the revs on the car were dipping very low when idling and two weeks ago it started cutting out on me when i was slowing down either to stop or go round a corner, i booked it into a mitsubishi garage who told me that it was due carbon build up in the engine and it would need cleaned costing almost £500 they also found that the fuel injectors were knackered (thankfully still under warranty) the mechanic explained that this occurs due the design of the fuel injectors and how they are unable to clean themeselves causing the carbon to build up. I was also told there isnt any way of totally preventing it but i could slow down the process by using super unleaded petrol, getting oil changed to fully synthetic and using a fuel additive regularly to help clean it.
Has anyone else encountered this problem?

the carbon build up is a problem because of the sulphur content of the fuel,it happens everywere outside japan,Lower the sulphur content in your fuel,better your gdi will work.As you said use super unleaded and the occasional fuel treatment additive and you should be fine

have you tried using redex in your petrol, its suppossed to clean the fuel system through . i use it and i get no problems