My 04 Rubicon has developed a sulfer smell. I did some searching and found many people say the cats or O2 sensors being bad. So I figured I would check the easiest first. I have pulled 3 of the 4 sensors and tested them with a multimeter and torch. The highest I can get any of them is .050 milivolts. Not volts, milivolts. Is it possible for all of my sensors to be bad and not throw a check engine light? the jeep runs fine. Seems to have plenty of power. Just has the dang smell when accelerating. It only has 87k miles on it. I just find it hard to believe all the sensors are bad without a noticeable drivability issue. I can imagine I'm doing the test wrong. Kinda simple. Add heat remove it. Any advice before I go replace these.