runs great cold, but when at operating temp pops backfires through exhaust, new wires and plugs and fuel filter, also no check eng light, neone help me ? opti ? coil ? icm ????????????

When it's cold the computer isn't looking at the sensors for input(closed loop I think). So if the problem happens when it warms up(open loop) then it most likely is a sensor giving bad information to the computer. I would think it should trigger a check engine light though. Check all the wiring connections to the sensors to make sure none are coming loose. Otherwise you'll probably need to get it scanned to see what is giving out bad information. Could be the MAF, O2 sensors, TPS, coolant temp sensor, IAT.