My advice would be to put all your carb settings back to stock, then try again. If you are losing compression after it warms up it could be any number of things. Could be it needs a new piston and sleeve. Is this a new truck or an old truck, and how long does it run? Do you know how hot it get's? If you don't have a temp gun, use the spit check. Spit right onto where the glo plug is and count how many seconds it takes to boil completely off, it should be within the 3 to 6 second range. If it boils away immediately, then it's running way too hot, or too lean, which will damage the engine. If you can give us more info it'll help us figure out what's going wrong.