Well I just started my NGH GT17 engine with the cap locked down this time and that fixed the issue. I have a good 2000rpm idle that is very steady and a 9400RPM top end. I flew my GP Escapade for a 10 minute flight and not one issue. On approch the idle stayed down with a good RPM and a very nice landing indeed. I want to say a big thank you to all od you who help with this.