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O2 sensor 79 non calif car...y/n 200

posted by  puchscooter on  Mon Feb 27 12:55 CST 2006
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last visit: Tue Nov 20 05:46 CST 2007
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'79 242 DL A/C Auto trans P/S 120K. Do you think it should have an O2 sensor or not. It is a MI car here in Maine, and I had the exhaust done at a shop. Is a Lambda Sond badged car, which should indicate an O2 sensor presence. I don't see it and no wire leading to right before the cat. Just spent 2200 for a ton of work that I didn't have the time/garage to do myself (like I would have), but is running a bit rough now @idle only. Could be the cause, but a little cold up here to get down on the ground when the shop that replaced the Y-pipe could be lookin at it. Please let me know...








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    O2 sensor 79 non calif car...y/n 200

    posted by  Rule 308 on  Mon Feb 27 14:25 CST 2006
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    last visit: Tue May 8 09:20 CST 2012
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    I hear what you are saying on the Lambda badge and I agree with it but my gut feeling is that it should not have the O2 sensor if it is not a Cali car. I have seen some odd stuff in the early B21 cars but the usual rule of thumb is that if it has no EGR then it will have an O2 sensor and vice versa. So does your old V have EGR or not? If it has no EGR then you should probably have an O2 sensor. Most if not all of the out of state 79 and earlier cars that I smogged had EGR and no O2 and I have seen cars as early as late '77 in Cali that were O2 sensor equiped. Volvo Cars N. America always preached that O2 sensors were not on their cars until '79 but I have seen otherwise on more than one occassion.


    Mark








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      O2 sensor 79 non calif car...y/n 200

      posted by  puchscooter on  Tue Feb 28 06:38 CST 2006
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      last visit: Tue Nov 20 05:46 CST 2007
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      Yeah, here is an enigma. Surely a B21F, no egr or o2 sensor visible anywhere. With the sond badge...did my brick get abducted by aliens and mutated? I still get crappy gas mileage too...








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      O2 sensor 79 non calif car...y/n 200

      posted by  puchscooter on  Tue Feb 28 00:35 CST 2006
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      last visit: Tue Nov 20 05:46 CST 2007
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      Yeah strange stuff...although I do have to take a look, I don't remember any ugly EGR like there was on my BMW 3.0s. It should be that noticeable though for that year, right?








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        O2 sensor 79 non calif car...y/n 200

        posted by  Rule 308 on  Tue Feb 28 03:50 CST 2006
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        last visit: Tue May 8 09:20 CST 2012
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        It should be fairly noticeable if you look for it. There should be a pipe in the back of the exhaust manifold, a valve with pipe under the intake manifold, a pipe going into the back side of the throttle valve and they usually had one of those large vacuum amplifiers with a bunch of vacuum lines going to/from it.

        Mark








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        O2 sensor 79 non calif car...y/n 200

        uid 18083's pic
        posted by  lucid on  Tue Feb 28 00:51 CST 2006
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        last visit: Fri Oct 24 12:31 CST 2014
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        If it has an O2 sensor, it will be in the exhaust manifold -- not downstream in the header or cat. But my Bosch FI catalog doesn't show a 240 with O2 sensor till the 1980.
        --
        Bruce Young
        '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.








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          O2 sensor 79 non calif car...y/n 200

          posted by  someone claiming to be chandrakumar on  Tue Feb 28 01:32 CST 2006 [RELATED]

          My recollection is like Mark's - EGR for federal and lambda for Cali '79s, but yes, the lambda would be in the exhaust manifold (where the EGR pipe would connect) and a frequency valve would be found under the intake manifold.

          The grilles could have been swapped, hence the cute badge; the emissions sticker should verify how it was intended.







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