New here and have a few Q's

[Bruce Plecan]

Some O2 sensors (ie some Toyo) are variable resistance types.
If you read thru the archives, you get a good grasp about O2 sensors, the
types, and capabilities.  In short the oem 1-3-4 wire units are designed as
switches, period.  While once the engine is tuned they can be used as an
indicator, that's about all they can do reliably.
Bruce




I have the schematic for an AF meter on my web site.
Just go to the site in my signature and check the AF Gauge on the left side.
You don't already have an O2 sensor in your vehicle? Um.... what vehicle
would that be?
O2 sensors work like a battery, in that they actually generate electricity
as opposed to changing resistance or current or something. The AF Gauge on
my site has an input resistance in excess of 1M, which means it will not
affect the output going to any other devices.
Geoff Allan; Calgary, Alberta, Canada
1987 Chrysler Daytona Shelby Z, T2, A555, original owner
http://www.calgary-web.com/cip/ShelbyZ.html

  -----Original Message-----
  From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
Behalf Of Jamie
  Sent: Sunday, September 10, 2000 7:01 PM
  To: DIY_EFI at lists.diy-efi.org
  Subject: New here and have a few Q's


  There doesn't seem to be much traffic on this list.  I've received 1
message in the last 2 days.  Is there something wrong with that?

  I'm looking for info on making an a/f meter.  Data sheets on wide band
o2's etc.  Or possibly running into someone who has one working of the Bosch
sensor.  I refuse to pay what even the cheapest setups are asking.
Especially when the sensor is worth a fraction of the price.

  Thanks


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