Hi there everyone

Erm, i started my nitro car yesterday and as soon as it started it wanted to go full speed. It's a brand new car and im trying to do the break in procedure at the moment. i tried the throttle trim on the controller, and it didnt help. I turned the idle screw while it was running and that didnt seem to make a difference either. BUT!, i turned one of the screws and now it stays perfectly idle for 4-5 seconds, then the revs build up and it gets on its way to full speed again, help please?