I have a '97 4.0 liter that idles very rough when you turn on the AC. The AC work great, it blows cold. Since this has began, no codes have been thrown. I have replaced the TPS, IAC, Map sensor, throttle body gasket, spark plus, plug wires, cap, rotor, oil and filter. After all was installed, there was no change with the rough idle. I'm not sure what else to replace or adjust. The mileage is 160k. Is there anything I have missed? I've about ran out of things to replace. Thank you for your input.
