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Slow front O2 sensor - long post 850

posted by  B.B. on  Fri Jan 6 21:41 CST 2012
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last visit: Mon Oct 6 13:15 CST 2014
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My 850 spends most of it's time with short runs across town. When I get out on the interstate and crank up the RPMs (I goose it to high RPMs on the on ramps)
then I was getting slow O2 OBD codes.
OK so I started using 93 octane ,At least I was paying for what they said was 93 octane. :-) (that's another thread) Then the O2 codes weren't so fast to get thrown, but still I get them.

OK the front O2 sensor isn't making the car happy, especially with high RPMs.
I'm wondering what impact that old O2 sensor has on performance and mileage
and when is the right time to change it out. I can't see any improvement
in mileage by switching from 87 octane to 93, and I'm paying attention to
multiple sources saying to avoid 87 octane gas.

What to do with the front O2 sensor? You can buy a lot of gas for what that critter costs.

????? Bill







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    Slow front O2 sensor - long post 850

    posted by  KlausC on  Fri Jan 6 23:13 CST 2012
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    last visit: Fri Oct 24 10:15 CST 2014
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    If the front O2 sensor gets old and dirty, it will cost you 2-5 mpg and sometimes more.

    I ran my cars with 89 octane, it comes with the same cleaners that 91 octane has. I also found that full boost (HPT) was limited to 5000 rpm with the 89 octane, 91 octane let me go to redline.

    Klaus
    --
    My advice is free, so you got what you paid for...








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      What sensor to get? 850

      posted by  B.B. on  Sat Jan 7 08:28 CST 2012
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      last visit: Mon Oct 6 13:15 CST 2014
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      Happy new year Klaus,

      Is it mostly the front O2 sensor that needs changing?
      What's the best choice for the O2 sensor?
      Is there much difference in the various parts options?
      Pricing, Performance, Longevity??

      Bill







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        What sensor to get? 850

        posted by  KlausC on  Sat Jan 7 10:30 CST 2012
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        last visit: Fri Oct 24 10:15 CST 2014
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        The rear O2 sensor lasts much longer than the front, so just get the front. While there are 'cheap' and OEM, I suggest getting a Bosh sensor with the correct plug. You don't want to splice wires. Shop arond.

        Klaus
        --
        My advice is free, so you got what you paid for...








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          What sensor to get? 850

          posted by  B.B. on  Wed Jan 18 10:20 CST 2012
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          last visit: Mon Oct 6 13:15 CST 2014
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          Hi again Klaus,

          I got back to shopping for the front O2 sensor.
          The Bosch website says maybe you can drift from 20MPG to 18MPG with a worn sensor.
          Why don't I want to solder? If I spend a few minutes with my solder iron
          and some shrink wrap I can save $50-70 depending on which Bosch sensor I get.
          There's at least 4 choices for the Bosch front sensor some are short cables
          some are complete OEM, some are splice and you reuse the old sensor wire.

          Please update your brickboard profile so I can email some O2 notes to you?

          Bill








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            What sensor to get? 850

            posted by  KlausC on  Wed Jan 18 11:56 CST 2012
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            last visit: Fri Oct 24 10:15 CST 2014
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            My profile hasn't changed in years.

            If you want to cut an splice, that is up to you. I prefer to plug and play, that way the two white wires are going to the proper plugs. And not all O2 sensors are created equal, some of the cheaper models will only last a year or so.

            The reason for the premium gasoline is twofold. It contains cleaners that keep the injectors clean. It also prevents detonation which is picked up by the knock sensors long before you can hear it. The activated knock sensors will enrich the mixture and retard the timing, fouling the plugs and O2 sensors as well as reduce the MPG.

            Klaus
            --
            My advice is 2 cents, so you got what you paid for...








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              Edit your profile 850

              posted by  B.B. on  Wed Jan 18 16:02 CST 2012
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              last visit: Mon Oct 6 13:15 CST 2014
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              Klaus,

              Edit your profile the email address is busted.
              Mail gets returned

              Bill








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                Edit your profile 850

                posted by  KlausC on  Wed Jan 18 17:38 CST 2012
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                last visit: Fri Oct 24 10:15 CST 2014
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                My profile is hosed. I don't get any replies from these posts, but I do get the consolidated reviews from the RWD and AWD section.

                Klaus
                --
                My advice is 2 cents, so you got what you paid for...








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                  Edit your profile 850

                  posted by  B.B. on  Fri Jan 20 05:57 CST 2012
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                  last visit: Mon Oct 6 13:15 CST 2014
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                  Your message has been enqueued and undeliverable for 1 day
                  to the following recipients:

                  Recipient address: bbanon+c9a6831ab9da499899f853408ff972b3@denizen.net
                  Reason: unable to deliver this message after 1 day






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