EL CAMINO What is this electrical box?

Discussion in 'Electrical' started by vpmac, Jun 2, 2018.

  1. vpmac

    vpmac Not-quite-so-new-guy

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    This little black box is located under the hood on the passenger fender. What is it for, what does it do? Do they ever need repair, like cause your accessories not to work? Maybe a dumb question but I cannot find a photo or anything on the web about it.

    Thanks

    Mac
     

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  2. TURNA

    TURNA Comic Book Super Hero

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    MAP sensor
     
  3. airboatgreg

    airboatgreg G-Body Guru

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    If no vacuum line a B map
     
  4. vpmac

    vpmac Not-quite-so-new-guy

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    What is it for? No vacuum to it.
     
  5. foxtrot

    foxtrot Royal Smart Person

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    Thats the gov tracking device - j/k

    As stated above its the MAP sensor.
     
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  6. TURNA

    TURNA Comic Book Super Hero

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    Is the computer crap still hooked up in the car?
     
  7. foxtrot

    foxtrot Royal Smart Person

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    The Map sensor provides manifold pressure to the CCC. The meas is used to calculate air density and air flow rate. This info is used to determine the optimum primary carb fuel metering while cruising. I believe that the CCC also uses it ti adjust the ignition timing while cruising.
     
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  8. Clone TIE Pilot

    Clone TIE Pilot Royal Smart Person

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    There are two modules there, the ESC module which operates the spark advance in conjuction with the ECM. The second module is either the vacuum sensor or the Baro sensor depending on ths model year. If there is a vacuum line going to the sensor, it is a vacuum sensor. Vacuum sensors are different from MAP sensors as they read inverse.
     
  9. airboatgreg

    airboatgreg G-Body Guru

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    Measuring barometric pressure.
     
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