Evening all. First of all, great website! I'm Caulkie from the Isle of Man. I have a wee problem with my 1998 1.2 corsa, and I'm hoping that someone might be able to help. The car every now and then, will just gas up and run lumpy. After revving it, it will clear itself, via a plume of black smoke emmanating from the exhaust. However, it will run a fast idle of about 1500rpm. This will continue until it will gas up again. The only cure I found is, to let it run idly until the cooling fan kicks in. Then it will run and idle sweet for a couple of days. I've already taken it to my local garage who put it on a diagnostics machine, and found nothing wrong. Any help or advice will be greatly appreciated. Regards, Caulkie.