suzuki gti 1994 model?

on the trottle body there is the idle speed adjusting screw
remove this right out and clean it will be full of black goo, spray carb cleaner down the hole to clean as best as poss, wind the screw in and via the rev counter adjust to 850-900 rpm
it will also go a lot better
make sure the co reading is 2-2.5 % you should get between 95bhp -105 bhp out of the car

Daniel leaney
October 2008