Make sure you test the O2 sensor immediately after driving. The non-heated sensors cool off quite quickly and may never get up to temp when idling. At least that has been my observation when testing my mixture. A cool O2 sensor will not give you accurate readings. Chris. Wysłane z iPhone'a Dnia Dec 22, 2011 o godz. 0:53 David Beierl <dbeierl@ATTGLOBAL.NET> napisał(a): > At 12:15 AM 12/22/2011, John Lauterbach wrote: >> Any suggestions on next steps? > > Unplug it again, stick a digital voltmeter* on 2-volt scale on it and > see how it behaves as engine warms up. If you play with the throttle > and can get it to show different voltages between about .2 and .8 > volts it's likely ok. If so leave engine running and connect back to > the ECU while voltmeter still connected. The meter*should* > immediately begin showing random changing readings, and if there's a > bar graph it should be cycling up and down with a period of a few > seconds at idle. > > Report back results... > > *Ideally a high-impedance analog meter like a VTVM, but not likely > you have one. But if the digital has a quick-acting bar-graph > display that would be nice. > > Yours, > David > ps - a contaminated sender can fail in a very short time - minutes or less. |
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