my bro just swap his supercharged gsr motor in his dx hatch.... everything was running fine when it was in his teg but when it was swapped to the hatch the engines rpm go up and down 3k to 1.5k when its cold. when its warm, the engine idles at 1.5k and there is no more room for adjustment on for the idle.... any ideas? thanks in advance

 

Sounds like a vacuum leak somewhere in most cases..., if you can't control it with the idle screw...