MAP sensor out of range??

Discussion in 'Technical' started by Richard Kuss, Jun 10, 2015.

  1. Richard Kuss

    Richard Kuss Kusstum Fabrication

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    I recently had my maverick sent down to me from northern CA to southern CA out here in the desert were I'm stationed. And my car started running like crap. I check the engine code (eecIV) and code 22 popped up saying my MAP sensor is out of range. I haven't tested it with a multimeter yet. But the vacuum line to the manifold isn't damaged. So I'm not sure what it would be.. I know I have a small vacuum leak in the heater/AC system on the dash where the controls are. But I've had that leak for a few years now. I can only assume it popped up now cause of the elevation change on where I live maybe? I don't have my AC hooked up and I'm tempted to disconnect the heater and plug all those lines. Anyone have any advise?
    70 maverick
    91 5.0 ho Efi
    C4
     
    Richard Kuss, Jun 10, 2015
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  2. mav1970

    mav1970 Bob Hatcher

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    I didn't see what engine you had and all I could think of was "A MAP sensor in a 70 Maverick" LOL!
     
    mav1970, Jun 10, 2015
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  3. Bryant

    Bryant forgot more than learned

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    is your car speed density or mass air?
    if its mass air, the map sensor should not have a vacuum line hooked to it. if its speed density then check for vacuum leaks and if none are found, you probably need a new sensor.
     
    Bryant, Jun 10, 2015
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  4. Krazy Comet

    Krazy Comet Tom

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    A '91 HO 5.0 doesn't have a MAP sensor(at least from factory), as they are mass air, so is used as a Baro sensor... Basically it's same sensor without vacuum applied...
     
    Krazy Comet, Jun 10, 2015
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  5. Richard Kuss

    Richard Kuss Kusstum Fabrication

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    Well mine is a 91 5.0 ho and my Map sensor has a vacuum line that leads to the rear of the manifold
     
    Richard Kuss, Jun 10, 2015
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  6. Richard Kuss

    Richard Kuss Kusstum Fabrication

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    My engine also came out of a markVII if thatakes a difference on the MAP sensor
     
    Richard Kuss, Jun 10, 2015
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  7. Krazy Comet

    Krazy Comet Tom

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    It does(I'm slipping)... All MK-VII used speed densety and that requires vacuum routed to sensor... So yes you do have a MAP sensor... Mustangs all had mass air starting with CA in '88 and & '89 for 50 states versions...

    Here's a good trouble shooting article, though if the electrical connection and vacuum are OK it's probably bad...

    http://troubleshootmyvehicle.com/ford/4.9L-5.0L-5.8L/how-to-test-the-map-sensor-1
     
    Krazy Comet, Jun 10, 2015
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  8. Richard Kuss

    Richard Kuss Kusstum Fabrication

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    I have a question requiring this. bring up an older thread. we determined that my 91 5.0 ho has a MAP becuase it came out of a mark VII, but I'm curious why it also has a MAF? pic referenced can it run off both?
     

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    Richard Kuss, Nov 18, 2016
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  9. Krazy Comet

    Krazy Comet Tom

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    Then you must be using a Mustang 'puter if it has a MAF meter, no circuitry in MK-VII computer to recognize the MAF...

    Never heard of such but maybe Calif MK-VII used MAF??

    If it is a Mass Air computer there is not supposed to be a vac line on the MAP, as I stated before it becomes a Baro sensor, port should be left open...
     
    Krazy Comet, Nov 18, 2016
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