Exhaust backfire and sudden loss of power

I have been trouble shooting this issue for almost 2 years. It began as an extremely intermittent sudden loss of power and a very loud backfire in the exhaust. It would continue to spit and sputter and backfire until I let of the throttle and let it return to idle RPM (btw manual transmission so I just put the clutch in). If I stay in the throttle, it will not recover, but doesn't die. It seems that the computer resets once it reaches idle rpm and changes to the open loop idle mode. It originally did this once in about 100miles or so. I got it to the point where I could set the cruise and it would do it within less than a minute, and I took it into my local dodge mechanic. He hooked it up and drove it and noticed that the temperature sensor would suddenly drop off for a split second. They changed the sensor and it seemed to be good to go. Then a few days later it began to do it again. It continues to happen randomly, cruising, accelerating, decelerating, from a stop, it doesn’t matter. I have even replaced all the wiring from the ECM to the temperature sensor, replaced the O2 sensor, and checked the throttle position sensor and map sensor. It seems like the timing or the mixture gets off, and the fuel is not getting burned. I have destroyed 2 mufflers, one of which was a seamed muffler that split open like exploded coke can. All the systems point to an electrical problem with the engine control system, but I have not been able to figure it out.