O2 sensor heater and lambda control issue

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  • ert
    S2Forum Hobbyist
    • Aug 2007
    • 16
    • Country: Estonia

    #1

    O2 sensor heater and lambda control issue

    I don't have very much first hand experience with these old cars but my 3B takes more than 5 minutes (maybe 7?) to go from open loop to closed loop (with outside temp around +5 to +10 C). I'm guessing this isn't normal?

    I checked the heater +12 and - at the plug and it light a 220mA test light nicely. The original sensor heater was 5,8 ohms which should be good. I swapped in a new Bosch sensor but nothing changed.

    Any suggestions what to check or do? Or is this proper behavior from such an old car (I doubt)?
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