Going back a bit here... At 08:18 PM 8/21/2011, John Lauterbach wrote: >Thank you for your help. Shorting the engine end of the O2-sensor >connector to ground makes the engine decrease RPM, run rough, and >exhaust to smell rich. That says ECU is at least approximately doing its job of closed-loop mixture control. > Voltage on sensor end of connector is about 0.20 >volts. When cable is not shorted, voltage goes up a bit to about 0.25. >When both halves on connector are joined, voltage is about 0.45 volts. >However, most of that voltage is present on the engine end of the >O2-sensor cable. I don't understand this statement, most particularly the last sentence. Could you expand/rephrase please? If you're getting different voltages at different points on the sensor cable then you have a connection problem. > Does this mean something in the ECU is wrong? Prolly not. Yours, David |
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