Cheers, the reason I was wondering about changing the injectors was because I was given carb redEx instead of injector stuff and since then it has unsurprisingly run like crap. I was told by the garage to run through a fresh tank of petrol to flush it out, but I thought I heard the injectors popping when I put the foot down, and the car doesn't seem to be going any better. I just thought changing the injectors might be a bit of a short cut to getting it running well again as I don't do a lot of miles and it would take quite a while for the petrol to work its way through.