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  • CEL Coming on and Turning Off

    Was curious if anyone knows what might be happening with my car. It's happened twice now on two separate longer trips. Both times it came one a couple times in the first 45 minutes or so and then turned off for the rest of my 2.5 hour trip. Both times there was no apparent reason. The car was acting and accelerating like normal. Both times it was at extended speeds of 55-70mph. No odd smells. No smoke. And by the time I get back home the CEL were off...so I'm not sure if I can do the normal procedures to check what codes it's throwing? Can I still check this if the CEL is off? My car is a '92 5 speed which just had it's transmission replaced around 2 weeks ago. Never thrown a CEL before these two incidents.
    -Rafe-

    Things I have for sale.
    Random Festiva Parts
    Festiva Non-Swoopy Power Drivers Mirror


  • #2
    CEL Coming on and Turning Off

    Mine does the same thing on long trips when the o2 sensor gets too hot, I have an 89 carb though. Doesn't mess anything up, It's only on trips longer than 30 minutes highway.


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    • #3
      CEL Coming on and Turning Off

      I recommend a new o2 and take it from there, I'm replacing mine soon.


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      • #4
        Somewhere to start I guess!
        -Rafe-

        Things I have for sale.
        Random Festiva Parts
        Festiva Non-Swoopy Power Drivers Mirror

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        • #5
          Happened to me last year. It was an 02 sensor..go on eBay got my denso o2 w connector for 20bucks!

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          • #6
            Looks like the Denso ones are 30 bucks. There are some Bosch ones for under 25.
            -Rafe-

            Things I have for sale.
            Random Festiva Parts
            Festiva Non-Swoopy Power Drivers Mirror

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            • #7
              Originally posted by Prafeston View Post
              Looks like the Denso ones are 30 bucks. There are some Bosch ones for under 25.
              Rockauto, when I got mine it was around $20 shipped with the plug.
              1991 Ford Festiva BP (Full Aspire/Rio Swap) (337k Miles) (Around 95k Engine)
              2002 Chevy Cavalier LS Sport 2.2L DOHC Ecotec (Threw a Rod)
              1998 Chevy Monte Carlo LS 3.1 V6 (225k miles) Best MPG = 28

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              • #8
                Weird, the APWI O2 sensor is like just a few cents cheaper than the Denso and at a little over 3 bucks shipping they come in at 19.XX. The Denso however the shipping is nearly as much as the part at like 13 something. Makes it over 30 bucks. Is there any reason to get the Denso over the APWI?
                -Rafe-

                Things I have for sale.
                Random Festiva Parts
                Festiva Non-Swoopy Power Drivers Mirror

                Comment


                • #9
                  Originally posted by Prafeston View Post
                  Weird, the APWI O2 sensor is like just a few cents cheaper than the Denso and at a little over 3 bucks shipping they come in at 19.XX. The Denso however the shipping is nearly as much as the part at like 13 something. Makes it over 30 bucks. Is there any reason to get the Denso over the APWI?

                  I would have to say just from the positive feedback the Denso gets on here is why I would choose it over the APWI one, that and I believe the Denso is what came in these cars when they came out of the factory, I believe this because even my TPS says Denso on the side.

                  You could try the APWI sensor, and report the results. I don't think I have heard of anyone using any thing other than Denso or the Universal Bosch. Would be nice to hear if they are comparable to the Denso.

                  Yeah I see what you mean, I have no idea why the shipping is so ridiculous on the Denso now, it certainly wasn't like that when I ordered mine.
                  Last edited by TorqueEffect; 03-19-2013, 01:42 AM.
                  1991 Ford Festiva BP (Full Aspire/Rio Swap) (337k Miles) (Around 95k Engine)
                  2002 Chevy Cavalier LS Sport 2.2L DOHC Ecotec (Threw a Rod)
                  1998 Chevy Monte Carlo LS 3.1 V6 (225k miles) Best MPG = 28

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                  • #10
                    Prafeston, Denzo is the one to buy if you want longevity and gas milage. At our parts store the Denzo is $21 with tax.
                    An idea can turn to dust or magic, depending on the talent that rubs against it.

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                    • #11
                      Looking at AutoZone they have two Denzo. One for 13. One for 29. The one that's 29 looks to have the connectors.
                      -Rafe-

                      Things I have for sale.
                      Random Festiva Parts
                      Festiva Non-Swoopy Power Drivers Mirror

                      Comment


                      • #12
                        Originally posted by Prafeston View Post
                        Looking at AutoZone they have two Denzo. One for 13. One for 29. The one that's 29 looks to have the connectors.
                        Yeah, the $13 one just requires you to splice a wire into the old plug. Pretty simple stuff.
                        1991 Ford Festiva BP (Full Aspire/Rio Swap) (337k Miles) (Around 95k Engine)
                        2002 Chevy Cavalier LS Sport 2.2L DOHC Ecotec (Threw a Rod)
                        1998 Chevy Monte Carlo LS 3.1 V6 (225k miles) Best MPG = 28

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                        • #13
                          Right on...I'll go cheap and wire my own sensor in then. Thanks!
                          -Rafe-

                          Things I have for sale.
                          Random Festiva Parts
                          Festiva Non-Swoopy Power Drivers Mirror

                          Comment


                          • #14
                            O2 sensor is not a guaranteed fix (it's such an innocuous-looking part!) but that simple thing does signal our (90-93) primitive computers about how to optimize intake fuel mixtures. Take heart: newer cars have even more expensive O2 sensors all over the place (before the Cat, during the Cat and after the Cat etc). These items do grow 'tired', with use and over time, and replacing them once in awhile is often a good thing for both fuel economy and keeping CEL's at bay.
                            There have been lively discussions on this forum about which brand to buy only because no two manufacturers make 'perfect marriage' parts in this regard.
                            Maybe someone will chime in on which is best suited for our applications (if in fact Denso is not the specific brand we should be installing).

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                            • #15
                              When looking them (O2 Sensors) up on Rockauto they do show the Denso as the OE part.
                              -Rafe-

                              Things I have for sale.
                              Random Festiva Parts
                              Festiva Non-Swoopy Power Drivers Mirror

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