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- From: welty@cabot.balltown.cma.COM (richard welty)
- Subject: Re: oxygen sensor
- Message-ID: <1992Oct12.164737.20620@cabot.balltown.cma.COM>
- Organization: New York State Institute for Sebastian Cabot Studies
- References: <1992Oct7.210906.18481@cabot.balltown.cma.COM> <BvvHJJ.9qK@ssesco.com> <1992Oct11.203434.27766@magnus.acs.ohio-state.edu>
- Date: Mon, 12 Oct 1992 16:47:37 GMT
- Lines: 29
-
- In article <1992Oct11.203434.27766@magnus.acs.ohio-state.edu> chohan@magnus.acs.ohio-state.edu (Harpal Chohan) writes:
- >>It would be nice to diagnosis the O2 sensor as bad before trying to pull
- >>it out...
-
- >You can hook a voltmeter to its output and observe how fast it reacts
- >when hot. Should fluctuate between 0.4 to 0.7 V at a fairly brisk
- >rate.
-
- use a high impedance meter, like a VTVM, for this task. it works well;
- some racers are now installing O2 sensors in their exhausts, and putting
- a meter on the dashboard so that they can watch the output of the sensor.
- rick pocock (races an ITB Alfa GTV in the northeast) has a dashboard
- mixture control connected to his fuel injection pump so that he can
- adjust the mixture as a race progresses.
-
- do not, EVER, try and measure the resistance of an O2 sensor with any
- sort of ohmmeter. it yields no useful information, and reportedly can
- damage a working sensor.
-
- note: these hints only apply to bosch and bosch-style O2 sensors; there
- are apparently some units that operate a little differently, and i'm not
- familiar with them.
-
- richard
- --
- richard welty 518-393-7228
- welty@cabot.balltown.cma.com
- ``if you can read this, mario, you're too close''
- -- bumper sticker seen on a CART safety truck
-