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1992 Ford Explorer Question: Vacuum line needs plugging in, but where?

 

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mrbarnard, Fresno, CA, February 06, 2014, 19:36
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My 1992 Ford Explorer XLT 4dr 4wd Auto 4.0 V6 has begun suddenly running rough and the check engine light comes on. It happened after I replaced the O2 sensor, when I was reaching behind the engine to get the O2 sensor wiring, and ended up pulling up that AND a vacuum tube from alongside the transmission fluid tube.

Here are links to pictures. I cannot find where this vacuum tube should be plugged in. Does anyone recognize it and have suggestions about where it should be connected?

[url=http://postimg.org/image/bd0olnog9/][img]http://s20.postimg.org/bd0olnog9/connection.jpg[/img][/url]

[url=http://postimg.org/image/5fwt4u7bd/][img]http://s20.postimg.org/5fwt4u7bd/engine_compartment_1992_Ford_Explorer_XLT_4dr_4w.jpg[/img][/url]

[url=http://postimg.org/image/3ljyn3kax/][img]http://s20.postimg.org/3ljyn3kax/vacuum_junction.jpg[/img][/url]

[url=http://postimg.org/image/oma080nt5/][img]http://s20.postimg.org/oma080nt5/vacuum_tube.jpg[/img][/url]

[url=http://postimg.org/image/6tog056kp/][img]http://s20.postimg.org/6tog056kp/Veiw_from_Drivers_Side_Fender.jpg[/img][/url]

[url=http://postimg.org/image/zfcx2sfpl/][img]http://s20.postimg.org/zfcx2sfpl/view_from_Passenger_Side_Fender.jpg[/img][/url]

3 Answers
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  • Answer #1

    G. T. Service Center (4231 Answers) , Stephenville, TX - (254) 638-3236
    ProfessorG February 06, 2014, 20:22
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     Master

    The pictures do not come up, says wrong maybe typing error.

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    mrbarnard, February 07, 2014, 09:36
     Rookie

    Here is a link that should work to the pictures: http://postimg.org/gallery/2hu3fss4a/

    Thanks!

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    ProfessorG, February 07, 2014, 09:49
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     Master

    The vacuum diagram shows 2 vacuum sources, one is where the PCV valve connects, by itself, and another where the brake booster hose is attached. That is the one that shows the line that is loose goes to, and also has the pressure regulator attached to the same vacuum port. See if this helps.

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  • Answer #2

    February 06, 2014, 22:44
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     Master

    Put your finger over the end of the hose, if it has vacuum present on the hose then it goes down to the transmission 'vacuum' modulator valve.... If NO vacuum is present then it goes to a vacuum source on the intake manifold. You should be able to hear this vacuum source leak. You may also feel around the intake for a vacuum leak, when you touch it the sound will change and engine will smooth out. There is where the hose hooks to the engine! Otherwise look under hood at the hose diagram or google it to see if a diag. can be found. Finally, you can always have a mechanic hook the hose back up for you! ★Drive the vehicle, if the trans doesh't shift right it goes to the vacuum modulator on the trans. IF the hvac (heat/ac) doesn't work right then that is where it goes and you should hear this vacuum leak!!

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  • Answer #3

    Greg's Orange Auto (14262 Answers) , Orange, CA - (714) 361-9386
    globalhelper February 07, 2014, 06:16
     Master

    ck vac diagram on under hood on label

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