yeh try the crc and clean the throttle body out with nulon carby clean at the same time, the nulons carby clean (bluey black coloured can) and the crc(red can) can be bought at repco, these are the two best from experience in the trade, and use a rag and old tooth brush to clean the throttle body houseing(inside) and the butterfly too, hold it open with ur hand holding the throttle down on the body and give a good clean with engine off, it will run a bit rough and maybe stall first time after uv cleaned it, but give it a good couple of revs and let it idle and it will be good as gold, and watch the black smoke come out when u rev it then it will be nice and clean

good luck with it