hello I'm new to nitro rc cars and to this forum so i didn't know where to put this. so i am using a ansmann vapor just got about 4 days ago had some trouble at the start but got it up and broke it in but when it is in idle it keeps moving, iv tried the idle screw which is more or less under the HSN if I'm not correct and iv screwed clockwise and anti clockwise and nothing happens sometimes on both rotations is goes faster but never slows down or stops wondering if i'm doing something wrong