RCU Forums - Trx engine trouble

I own a t-maxx 2.5 and i really like the engine on it but about a month ago the engine started to play up. It kept stalling so i thought that the piston had wornen out since it has had quite a lot of running. So i changed the piston and sleeve and also brought a new cooling head for it. As i started trying to run the engine in, it started to get the same peoblems as it did before i replased the piston. Its got so bad now that as soon as i take the glow stick off the engine stalls. If i leave the glow stick on for about 2 minits i can get the engine to run for about a minit befor it cuts out. I have tryed different fule and different tuning setting but there was no change. I have also taken the engine and carb apart again but i could find nothing wrong with it. I have been in this hobby now for about 5 years so i no these are not just "brake in pains". I think it might be down to loss of compression but i cant work out why because i have changed all these parts: Cooling head, Glow plug and gasket, Head gasket, piston and sleeve, the fule i have been using.
Somebody please help me with this problem its driving me MAD[:@] !!!!!!!!!