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Old 03-08-2003, 04:20 PM
Posts: n/a

86 2.3-16 190e

Since the shop adjusted my mixture and my potentiometer is out of adjustment I have to ask which one to adjust first and what the procedures are. Is it wrong to assume that the O2 sensor either works or it does not? My biggest frustration with the car is that nothing seems consistent. I do not understand how a Potentiometer or Mixture being out of calibration would cause different operational problems when all other operational conditions (outside temp, engine warm up time etc.) are the same. This is why I question the CIS control unit. Something is arbitrarily causing the ECU to send bogus signals to the rotory idle air valve. Can this be the potentiometer? Also what about my O2 sensor hanging at .9 volts then a minute later adopting the oscilating voltage with an average at .5?
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