O2 sensors???

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  #1  
Old 03-29-04, 02:24 PM
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O2 sensors???

99 chevy blazer with the 4.3L V6 with a little over 100,000 miles. I am going to do the tuneup soon and want to know about the O2 sensors. How do you "check" them or is it a good idea to just replace them? I would not ask this about my 89 burban, but it has only one at $30 unlike the blazer which has 4 at $100 a piece-so says the partshouse site, haven't looked yet, it scares me...
 
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Old 03-29-04, 02:46 PM
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I would leave them alone if something is wrong with one the powertrain control module should kick the ses light on.Not a maintenance item like the older vehicles.
 
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Old 03-29-04, 03:02 PM
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Thankyou. That would make for some expensive tuneups...

I assume from your response, no electrical items should be touched in an OBD2 system unless the computer asks you to.
 
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Old 03-29-04, 03:19 PM
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That would be correct but I would change the cap, rotor and wires at that mileage unless done recently.You have been here long enough to know the rest of the list.
 
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Old 03-30-04, 04:05 AM
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Yup Yup, thankyou.
 
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