XPost: alt.home.repair, ca.driving   
   From: arlen_holder@newmachines.com   
      
   According to this discussion on the oxygen sensor reading:   
      
   1. At the 14:1 stoichiometric ratio we should get a reading of 450mV,   
      but the pre-cat oxygen sensor will fluctuate around 500mV in use.   
      
   2. The post-cat oxygen sensor should be more steady at around 500mV   
      since it's reading "cleaned up" exhaust.   
      
   3. However, if the pre-cat sensor is receiving too rich a fuel mixture,   
      it will read a fairly steady 1.0V while too lean will read near 0V.   
   --   
   According to Autozone for a 2004 Mitsubishi Lancer ES 2.0L FI SOHC 4cyl   
   o Upstream Bosch Part #15514, Walker 350-34173, Denso 234-4739, NTK 21512   
   o Downstream Bosch Part #15360, Walker 350-34644, Denso 234-4642, NTK 23513   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)