Was:Air/Fuel for CIS/CIS-E, now technotes

[timjmcconnell at gmail.com (Timbo)]

That's great stuff, cathy - I will be sure to add that to the oxygen
sensor part of my note. BTW - anyone know where to get the CO tube cap
for cheap - mine went missing!
--Timbo

On 2/21/06, C Boyko <roccit_53@scirocco.cs.uoguelph.ca> wrote:
> Okay, here are some odds and ends I had from when I was trying to pass
> ETest/ exploring the world of mixture...
>
> From the two Bosch books: (and these should likely get a proper
> referencing, I can send you that if you want it):
> "Lambda sensors have a voltage output that rises from near zero in the
> absence of oxygen in the engine exhaust to a bit less than one volt when
> small traces are present, ...The sensor only works when hot,however . (
> being essentially inoperative below 300C...some senosrs have an interanl
> heating element to bring it on-line as quickly as possible.)" (HP Books)
>
> "The Lambda sensor consists of a zirconium oxide ceramic which becomes
> conductive for oxygen ions at 600F (is this 300C???? anyways...)One part of
> the ceramic is located in the exhaust stream while the other is exposed to
> ambient oxygen. The surface of the ceramic is covered with a thin, gas
> permeable layer if platinum...(when ambient and exhaust sides read equal,
> no voltage, etc..) The Lambda sensor output voltage reads from 100mV to
> 900mV during normal engine operation....The Lambda sensor will very seldom
> develope a defect. It is, however, very susceptible to contamination.
> Common contaminants are tetraethyl lead, RTV silicone, and soot......."
> (Motorbooks)
>
> Now in my words:
> Anyway, use a voltmeter, and the output voltage on a warmed up car should
> be between 100 and 900mv and fluctuating (after elevating engine speed to
> 2000 rpm for a few minutes), and 450mV is stoichiometric (perfect for
> complete combustion). Lower would be lean, higher would be rich, which is
> always safer.
> No voltage, and the puppy's dead or not connected. There are more
> diagnostics in the book, bt I have to go to work....
>
>
> Cathy
>
>


--
Timbo!
Location: Glenside, PA!
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