Thanks Art, I corrected that error but the problem persists. What I have found is that while in a tight loop reading any A/D input the input impedance becomes much lower and causes A/D readings that are way out of whack. For example; I have a 10k input resistor and there is .212 volts on the input and .108 on the processor side while continuously reading. If I comment out the line that reads the A/D I get .212 volts on both sides of the resistor.