re: Subject: Spider emissions

[Ian Lomax <sfalfisto@domain.elided>]

Rob,

You have to keep the o2 sensor connected when you test
it.  The switching that Eric refers to is part of the
sensor's natural operation.  If you disconnect it, it
can't send the signal back to the computer, and you
won't see any switching.

If you pull the boot back to reveal the connector, you
can connect a voltmeter between the connector and
ground.  With the engine running you should see the
voltage "switch" between 0.2 and 0.8 V as Eric
mentioned.  If it just sits at one voltage, then it's
dead, and I'd be glad to sell you a new one cheap. 
They're pretty hard to kill, I doubt yours is dead. 
Feel free to email me or Eric if you'd like more
clarification or explanation.

Happy Holidaze,
Ian "former automotive industry minion" Lomax

--- "Robert W. Murphy" <rmurphy@domain.elided> wrote:
> Eric,  I have been wondering about the O2 sensor on
> my 90 Spider and if it is 
> working properly or not.   I would like to test it,
> but am not sure exactly 
> how to do it.   I am guessing that I should
> disconnect the sensor at the plug 
> and measure the voltage with the car warm and
> running.  Correct?   Also, what 
> do you mean it should switch between .2 and .8
> volts?
> 
> Thanks,
> 
> rob murphy
> 90 Spider
> - - - - - - - - - - - - - - Original Message - - - -
> - - - - - - - - - -
> Date: Wed, 19 Dec 2001 12:57:31 -0500
> From: "Storhok, Eric (E.M.)" <estorhok@domain.elided>
> Subject: Spider emissions
> 
> Nick,
> Based on what you sent, and assuming that your 1
> year old sensor is still 
> good, it appears that your catalyst is pretty much
> dead.  
> 
> Before changing, though, do make sure the O2 sensor
> is working properly- when 
> its warm, it should switch between .2 and .8 or so
> Volts.  If its not working 
> as intended, even a new catalyst won't help.
> 
> Eric Storhok
> Core Emissions and Fuel Economy Team
> Advanced Powertrain Engineering
> (313)33x75011
> MD 35, FPC-B
> Ford Motor Company
> 
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