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    #1

    Ambient Air Sensor

    Quick question, I had an 85' GM that had shitty heat so my brother did a heater core, didn't fix it. So I fumbled under the dash, but my finger over a hole on a blue sensor, and voila, hot smoldering heat, so for the winter, I just stuck a piece of foam in it and called it good.

    So I have an 87 GM that has similar issues to this. I flushed the system, still just mediocre heat. I want to take the dash apart and test the sensor but I have a quick question.

    Is this sensor in all the Grand Marquis, or just the ones with the auotmatic climate control? My 85GM had Automatic Climate and this one doesn't, and I don't want to dig around the dash looking for something that may not even exist. Gonna check the blend door while I'm in there too. I don't really want to spend the money on a new sensor that is like $80, but if it means hot heat in the shitty Michigan winters, spare no expense.
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    #2
    As far as I am aware - NO ATC NO SENSOR. It is located right under the Dash Pad around the middle of the pad and has a plastic tube running down. NO ATC means you should only have a cable to the Blend Door. Maybe either the cable or door is stuck but others here may have more info.


    "Hope and dignity are two things NO ONE can take away from you - you have to relinquish them on your own" Miamibob

    "NEVER trade your passion for glory"!! Sal "the Bard" (Dear Old Dad!)

    "Cars are for driving - PERIOD! I DON'T TEXT, TWEET OR TWERK!!!!"

    Comment

      #3
      you most likly have ATC, which is vacume controled. a cheap, easy thing to do, just to get you by is to plug the vac line. if you open the glove box and look on top of the heater box, you will see a goldish color vac servo(round metal can), with a clear vac hose going to it. if you remove the clear hose from the gold can and plug it(i use golf tees, since they came with my car lol), you will have full heat all the time. i did this on my wagon, since its mostly a winter car.

      1981 Mercury Marquis Brougham 2-Door 302/ 5-speed -special blend (GMGT)
      1987 Lincoln Mark VII 5-speed (Errand runner)
      1989 Mercury Grand Marquis (Base Runner)
      2007 Lincoln Town Car Signature Limited (Hustlyn)
      2011 Ford Crown Victoria Police Interceptor (Down with O.P.P)

      Comment

        #4
        Thought he said his '87 DIDN'T have ATC? Did I misread or simply "mis spoke" (shades of Al Gore, here)?


        "Hope and dignity are two things NO ONE can take away from you - you have to relinquish them on your own" Miamibob

        "NEVER trade your passion for glory"!! Sal "the Bard" (Dear Old Dad!)

        "Cars are for driving - PERIOD! I DON'T TEXT, TWEET OR TWERK!!!!"

        Comment

          #5
          ATC as in the lowest fan speed is automatic and it stops blowing onces its reached a certain temperature? That I DO NOT have.

          Comment

            #6
            sorry, got your cars mixed up. disregard everything i said...

            1981 Mercury Marquis Brougham 2-Door 302/ 5-speed -special blend (GMGT)
            1987 Lincoln Mark VII 5-speed (Errand runner)
            1989 Mercury Grand Marquis (Base Runner)
            2007 Lincoln Town Car Signature Limited (Hustlyn)
            2011 Ford Crown Victoria Police Interceptor (Down with O.P.P)

            Comment

              #7
              There's another type of ATC that has temps marked across the temp slider and the usual fan speeds (like in my Mark) and the fans speed reduces from the setting it's on instead of having an auto setting.

              Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
              rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)

              Originally posted by gadget73
              ... and it should all work like magic and unicorns and stuff.

              Originally posted by dmccaig
              Overhead, some poor bastards are flying in airplanes.

              Comment

                #8
                Guess we would have to know (maybe a photo?) EXACTLY what he has so we can help.


                "Hope and dignity are two things NO ONE can take away from you - you have to relinquish them on your own" Miamibob

                "NEVER trade your passion for glory"!! Sal "the Bard" (Dear Old Dad!)

                "Cars are for driving - PERIOD! I DON'T TEXT, TWEET OR TWERK!!!!"

                Comment

                  #9
                  If the slider is not marked in degrees, and does not have the words Automatic Climate Control, you don't have the sensor. The blend door is controlled by the cable. Its either cold or hot, as long as the cable is hooked up. If the engine is running at the proper temperature and you still have poor heat, the core is probably partially clogged. Just make sure the engine has the right thermostat first. Running a colder or one of those failsafe thermostats can cause the motor to not make enough heat. I know when I had a 180 in my Towncar, the heat was OK, but it was much better when I put the proper 195 stat in there.
                  86 Lincoln Town Car (Galactica).
                  5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

                  91 Lincoln Mark VII LSC grandpa spec white and cranberry

                  1984 Lincoln Continental TurboDiesel - rolls coal

                  Originally posted by phayzer5
                  I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

                  Comment

                    #10
                    That 'ill work!


                    "Hope and dignity are two things NO ONE can take away from you - you have to relinquish them on your own" Miamibob

                    "NEVER trade your passion for glory"!! Sal "the Bard" (Dear Old Dad!)

                    "Cars are for driving - PERIOD! I DON'T TEXT, TWEET OR TWERK!!!!"

                    Comment

                      #11
                      failsafe t-stat= fail! my buddies old ranger went through 2 of em, till i put a motorcraft one in. never had an issue after.

                      1981 Mercury Marquis Brougham 2-Door 302/ 5-speed -special blend (GMGT)
                      1987 Lincoln Mark VII 5-speed (Errand runner)
                      1989 Mercury Grand Marquis (Base Runner)
                      2007 Lincoln Town Car Signature Limited (Hustlyn)
                      2011 Ford Crown Victoria Police Interceptor (Down with O.P.P)

                      Comment

                        #12
                        Another reason I usually use OEM parts for most of my repairs, especially sensors and the like...


                        "Hope and dignity are two things NO ONE can take away from you - you have to relinquish them on your own" Miamibob

                        "NEVER trade your passion for glory"!! Sal "the Bard" (Dear Old Dad!)

                        "Cars are for driving - PERIOD! I DON'T TEXT, TWEET OR TWERK!!!!"

                        Comment

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