Just to make this clear, im not a n00b at RC's been into it for years...well i just got my picco .27 back from colt from modding and its been a week, Ive been very happy with it, very good performance. My problem is that The idle keeps going up and down no matter what i do...if the idle is high, i lower it...justa tad, it goes really low and i have to rev it, i decided to keep it high, but after a half a tank, the idle drops alot...IDK what is going on, i got new fuel line, clutch(cause it fried) a new glow plug(novarossi c7) (cold glow plug) and nothing changed. I think its a low tank lean. Or possible an air leak. Ill seal everything up...tonight with RTV sealer. And BTW i use O'donalds 30% fuel alos and this is in a jammin, my temps are highest at 225 with body on and 200 w/o it. What could be the problem here? if this is normal i feel soo dumb lol

Ya probably a leak in the carby neck or crankcase, sealing it up should fix it. theres a nitro FAQ/Guide thread on this section by hpi apollo, it will show you how to completely seal your engine up.

Make sure theres no bubbles in the fuel line and ill assume that the engine is tuned well

remember to link
http://www.rcuniverse.com/forum/m_5517128/tm.htm