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Pre Cat O2 sensor

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  #11  
Old 06-30-2011 | 05:21 PM
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Originally Posted by SXX360
Did you put the O2 sensor in or is it out?
its been in, only time when it was out was when i was replacing it
 
  #12  
Old 06-30-2011 | 05:22 PM
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Originally Posted by siggie30
Coolant temp sensor is mainly used while the vehicle is warming up. Once it surpasses the required temp, the coolant sensor has no value (of interest). The O2 sensor picks up, once the probe is about 600 degree's (changes depending), there are other sensors, but going by your specific question, one of your sensors are losing output. You should study the lambda principle if you want to learn about the EFI sensors affects (aptly named "The Brettschneider equation") . Try a data scanner to see if you get any codes.
does it make any difference if it stops after the truck worms up and dosnt happen as often when the engine has wormed up?
 
  #13  
Old 06-30-2011 | 05:47 PM
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Originally Posted by InnerCityHillBilly
does it make any difference if it stops after the truck worms up and dosnt happen as often when the engine has wormed up?

Yes, but if it does "as often" in both warmths, then the sensors may not be the problem.
 
  #14  
Old 06-30-2011 | 11:27 PM
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i might just replace the one that hasnt been replaced yet, and if it fixes great and if it dosnt it will only be 10 bucks
 



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