I have no codes currently. Previously I did have a knock code. When I look at the PCM sensory output, I can see the O2 sensor going out of its normal range of .1 to .9 volts whenever I accelerate. I have already replaced the sensor.
Could a leak in fuel system within the air manifold be causing the missing condition and the O2 sensor to go off the scale or is normal for the 02 sensor to off the scale during acceleration?
The problem did seem to get worse after the fuel injector system was cleaned (sujected to high pressure at the dealer.)
The only time the PCM is in closed loop mode is when the O2 system is off the scale and shortly therafter. Otherwise it is in open loop.
See picture for sensor output. [img:5a8a6021ba]http://www.2carpros.com/forum/automotive_pictures/55713_S10_sensory_output_1.jpg[/img:5a8a6021ba]
Could a leak in fuel system within the air manifold be causing the missing condition and the O2 sensor to go off the scale or is normal for the 02 sensor to off the scale during acceleration?
The problem did seem to get worse after the fuel injector system was cleaned (sujected to high pressure at the dealer.)
The only time the PCM is in closed loop mode is when the O2 system is off the scale and shortly therafter. Otherwise it is in open loop.
See picture for sensor output. [img:5a8a6021ba]http://www.2carpros.com/forum/automotive_pictures/55713_S10_sensory_output_1.jpg[/img:5a8a6021ba]
Jan 24, 2007 at 11:52 PM
