It is almost a year since i last played with my G4S. It is powered by a Novarossi Rex engine(RE 12S3). I was expecting some difficulties in starting up the engine. But it turn out to be effortless.The compression is still strong. Thumbs up for the quality in Novarrossi engines. The car "shoots" like an arrow at the slightest pull of the trigger. A lot of power in it. But there is a problem; the engine can't hold the idling, it just dies off after a few seconds if i stop pressing the throttle. What could be the problem? How can it be resolved? Please advise me. Thank you.