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    '87 GM O2 Sensor Question

    Haven't done them in MANY years so can't remember (hence this question). Is it easier to access them from the top or from underneath with a lift or ramps??


    "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!!!!"

    #2
    In addition, how are the aftermarket ones - just as good as OEM?? Any ones in particular?


    "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
      Bump.....


      "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


        #4
        pretty much. and on the boxes, there's enough clearance for the big fat ones and you don't need to get the skinnies.

        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


          #5
          Rockauto has NTK's for I think less than 30 bucks a piece.
          1990 MGM: $50 E7 heads, HO cam, Holley SysteMAX lower intake, HO upper intake with an Explorer TB. LSC ECM. Lincoln logs into stock dual exhaust. K&N drop in air filter. Wide ratio AOD, 2400 converter with a 3.08 one tire fire out back. Car is less slow now. Then there's the '92 Beater. Dual 2.25" exhaust with shiny tips. Rumbles nice. Super slow. Burns oil too.

          Comment


            #6
            The originals were Bosch, and the Bosch aftermarkets are essentially identical.



            I've only ever done a single on a stock box manifold, and it seemed easier from the top. That was on a CFI car.
            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

            Everything looks like voodoo if you don't understand how it works

            Comment


              #7
              Have to take a good look if/when I am up to it. Not sure what it will do to improve MPG's. If my Trip is correct and it is only "city" driving, the number is around 13. CAN'T LIKE THAT!!


              "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


                #8
                if they aren't ancient, they probably aren't where I'd be looking for problems. One way to test them if it has the smog pump is to do an engine running test. If you get an 11, they're probably OK. If you get a code 44 and/or 94 and you know the smog stuff works absolutely correctly, they may not be working. Vacuum leaks are slightly more likely, but quite honestly these cars suck in stop and go with the stock gears. Theres not much to be done for it short of installing gears that make sense. 2.73 and 3.08 ain't it.
                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

                Everything looks like voodoo if you don't understand how it works

                Comment


                  #9
                  They are in "many years" but the car still only has 126K so there is probably not that much mileage on them. Would have to sort through my parts receipts to get an exact date but late 90's would be close. It still has the smog pump and I have never changed the vac lines. Car runs smoother than butter but could be.....believe the last time (a few years ago) when I checked for codes (just for grins) I got the "famous 11"!! If I could get down there I'd change them just for fun!


                  "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


                    #10
                    they may be rusted solid... liberal penetrating lube application and a breakover bar used with the O2 socket are a wonderful thing.

                    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


                      #11
                      Don't remember they being an issue but it WAS a long time ago!


                      "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


                        #12
                        The originals in my 92 were NTK. Same for the box engine in the corner of the garage. It has NTK O2's with a Ford emblem stamped on it.
                        1990 MGM: $50 E7 heads, HO cam, Holley SysteMAX lower intake, HO upper intake with an Explorer TB. LSC ECM. Lincoln logs into stock dual exhaust. K&N drop in air filter. Wide ratio AOD, 2400 converter with a 3.08 one tire fire out back. Car is less slow now. Then there's the '92 Beater. Dual 2.25" exhaust with shiny tips. Rumbles nice. Super slow. Burns oil too.

                        Comment


                          #13
                          If the car has 126k on it, and you've changed those sensors already, they're probably OK. I'd be changing vacuum lines first. Those are a lot less difficult and expensive too.
                          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

                          Everything looks like voodoo if you don't understand how it works

                          Comment


                            #14
                            Originally posted by gadget73 View Post
                            If the car has 126k on it, and you've changed those sensors already, they're probably OK. I'd be changing vacuum lines first. Those are a lot less difficult and expensive too.

                            +1 on that....for some reason I seem to remember changing them at like 75K or so?? Got to see if I still have the receipt for them and can match the date to my list of oil changes to approximate the mileage.


                            "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


                              #15
                              I replaced the original O2s at 180k miles. Didn't make a gnat's ass of difference in fuel economy. When I was doing heavy city driving and lots of short trips in mine, I saw around 12.5 mpg. And I KNOW I have no vacuum leaks.
                              Originally posted by gadget73
                              There is nothing more permanent than a temporary fix.
                              91 Mercury CP, Lopo 302, AOD, 3.08LSD. 3g upgrade, Moog wagon coils up front, cc819s in the back. KYB GR-2 police shocks. Energy suspension control arm bushings. Smog deleted.
                              93 F-150 XLT, 302, ZF 5-spd from 1-ton, 4wd.
                              Daily--07 Civic Coupe. Bone stock with 25k miles
                              Wife--14 Subaru Outback. 6-speed.
                              95 Subaru Legacy Wagon--red--STOLEN 1/6/13

                              Comment

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