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Old 06-14-2005, 00:12   #1 (permalink)
sw
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No EGR yet I have an EGR vacuum line

'92 Explorer XLT 4.0L V6-pushrod 4WD.

Now, not all '92 Explorers have EGR valves, correct? If they did it
would be marked on the sticker above the radiator, correct? Mine
doesn't have an EGR on the sticker and I can't seem to find one
anywhere that people say it should be if I had one. I have a mystery
vacuum line then. OK, according to my Haynes manual diagram of the
vacuum hose fitting and cap assembly, I have a vacuum line coming from
what they are calling the 1/4 inch EGR port. It's located next to the
air cleaner port. When I follow the vac line from the EGR port it's
pathed about 3 feet around the engine to just above the engine oil fill
cap. There it ends at a coupling, opened and not plugged, just sitting
there without another line in the other end. Where the other end of the
vac line that plugs into the coupling is I have no clue. I looked
everywhere. Since I apparently have no EGR, where is this vac line
supposed to be going? What's the part called and where is it located.
Not a huge car guy here so a description going by location to easily
recognized parts is appreciated. The guys at Autozone and Advanced Auto
Parts have no clue and say they can't look it up by the part number
that's on the rubber vac line boot. It turns out this combined with a
stuck thermostat may be what a mechanic confused with a blown head
gasket. When I replaced a burst upper radiator hose, I probably snagged
this vac line by accident. I'll be pissed, yet very glad if this is
what all the trouble has been, assuming I can figure out where this vac
line connects. Thanks for any help.

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Old 06-14-2005, 00:12   #2 (permalink)
Charlie Bress
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Re: No EGR yet I have an EGR vacuum line

I sort of recall this situation. It seems like I had the same problem on my
92.

Look at a wiring bundle that is near there.It comes up from below the
engine. It is wrapped in black tape. Remove an inch or so of the tape from
the top and see if you find the loose end of vac line sticking up with
nothing attached. That is where the end of your unconnected line goes. If I
recall correctly that line operates a door that controls the air flow to
a/c vents.

If none of this makes sense, send me an email and I will try to clarify it
with a picture. Can't post pictures to the newsgroup.

Charlie

"sw" <wessock@gmail.com> wrote in message
news:1117944462.956939.262440@z14g2000cwz.googlegroups.com...
> '92 Explorer XLT 4.0L V6-pushrod 4WD.
>
> Now, not all '92 Explorers have EGR valves, correct? If they did it
> would be marked on the sticker above the radiator, correct? Mine
> doesn't have an EGR on the sticker and I can't seem to find one
> anywhere that people say it should be if I had one. I have a mystery
> vacuum line then. OK, according to my Haynes manual diagram of the
> vacuum hose fitting and cap assembly, I have a vacuum line coming from
> what they are calling the 1/4 inch EGR port. It's located next to the
> air cleaner port. When I follow the vac line from the EGR port it's
> pathed about 3 feet around the engine to just above the engine oil fill
> cap. There it ends at a coupling, opened and not plugged, just sitting
> there without another line in the other end. Where the other end of the
> vac line that plugs into the coupling is I have no clue. I looked
> everywhere. Since I apparently have no EGR, where is this vac line
> supposed to be going? What's the part called and where is it located.
> Not a huge car guy here so a description going by location to easily
> recognized parts is appreciated. The guys at Autozone and Advanced Auto
> Parts have no clue and say they can't look it up by the part number
> that's on the rubber vac line boot. It turns out this combined with a
> stuck thermostat may be what a mechanic confused with a blown head
> gasket. When I replaced a burst upper radiator hose, I probably snagged
> this vac line by accident. I'll be pissed, yet very glad if this is
> what all the trouble has been, assuming I can figure out where this vac
> line connects. Thanks for any help.
>



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Old 06-14-2005, 00:12   #3 (permalink)
sw
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Re: No EGR yet I have an EGR vacuum line

Well I looked but I didn't see any connection there. Any wiring
harnesses in the area are very well taped and covered in the protective
plastic tubing. I don't see a place where a vacuum tube could have come
out there. Was your engine a pushrod or the more popular SOHC? The
difference between the 2 set-ups is actually pretty big. Unfortunately
all of the diagrams I've been able to find are for the SOHC engines and
not the pushrods like mine is. I looked up the door you mentioned in my
Haynes book but I couldn't find anything on it. I know the concept of
it but have no clue what the actual name and location is of it. I
appreciate the help though Charlie. I'll e-mail you for a picture to
see if I missed something. I'm using google groups so I'll have to
guess at the middle of your address. If you don't get an e-mail I
guessed wrong.

Does anyone know for sure where in a pushrod set-up this vac line is
supposed to end up and where in the engine the part is? If I know the
part and location I can find the part and back track(hopefully). Again,
no expert here so please describe it as simply as possible. Thanks
again.

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Old 06-14-2005, 00:12   #4 (permalink)
Charlie Bress
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Re: No EGR yet I have an EGR vacuum line

Okay, I confuse easily. Let's establish something.
I am sitting here looking at Ford Engine Service Manual for 1992 ( the Helms
edition)
Look at your VIN. Check the eighth character, that's the engine code..
According to my book there was only one 4.0 engine The eight character is an
X.
There was a 2.9 with the letter T used on Rangers
There was a 3.0 with the letter U used on Rangers and Aerostars.

Whatcha got?

Charlie



"sw" <wessock@gmail.com> wrote in message
news:1118014527.203423.305430@g43g2000cwa.googlegroups.com...
> Well I looked but I didn't see any connection there. Any wiring
> harnesses in the area are very well taped and covered in the protective
> plastic tubing. I don't see a place where a vacuum tube could have come
> out there. Was your engine a pushrod or the more popular SOHC? The
> difference between the 2 set-ups is actually pretty big. Unfortunately
> all of the diagrams I've been able to find are for the SOHC engines and
> not the pushrods like mine is. I looked up the door you mentioned in my
> Haynes book but I couldn't find anything on it. I know the concept of
> it but have no clue what the actual name and location is of it. I
> appreciate the help though Charlie. I'll e-mail you for a picture to
> see if I missed something. I'm using google groups so I'll have to
> guess at the middle of your address. If you don't get an e-mail I
> guessed wrong.
>
> Does anyone know for sure where in a pushrod set-up this vac line is
> supposed to end up and where in the engine the part is? If I know the
> part and location I can find the part and back track(hopefully). Again,
> no expert here so please describe it as simply as possible. Thanks
> again.
>



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Old 06-14-2005, 00:12   #5 (permalink)
sw
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Re: No EGR yet I have an EGR vacuum line

It's an X but there are def 3 different engines according to my Haynes
manual and the diagrams I've been able to find online.. The 4.0L
Pushrod V6, the 4.0L SOHC V6, and the 5.0L V8. Maybe they weren't all
available in '92 though but the diagrams I'm finding are for the SOHC
V6 even though they say '92. Standing at the bumper looking at the
engine, my battery is in the front left corner and my coolant/washer
reservoirs are in the front right. If yours matches that we should have
the same set-up from what I've seen.

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Old 06-14-2005, 00:12   #6 (permalink)
Charlie Bress
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Re: No EGR yet I have an EGR vacuum line


"sw" <wessock@gmail.com> wrote in message
news:1118019273.156298.121680@g43g2000cwa.googlegroups.com...
> It's an X but there are def 3 different engines according to my Haynes
> manual and the diagrams I've been able to find online.. The 4.0L
> Pushrod V6, the 4.0L SOHC V6, and the 5.0L V8. Maybe they weren't all
> available in '92 though but the diagrams I'm finding are for the SOHC
> V6 even though they say '92. Standing at the bumper looking at the
> engine, my battery is in the front left corner and my coolant/washer
> reservoirs are in the front right. If yours matches that we should have
> the same set-up from what I've seen.
>


That's better. Now we are on the same page. I have more faith in the Ford
(Helms) manual for 1992 than I do in a Haynes publication that tries to
cover too much other stuff. I bought the 92 new and just turned 174,000.
The Helms books are pricey, but I always keep a car for a long time and
consider how many shop hours I have to avoid to pay for the books. It
doesn't take long.

I will try to email you a photo of mine and indicate where the vacuum line
is



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Old 06-14-2005, 00:12   #7 (permalink)
sw
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Re: No EGR yet I have an EGR vacuum line

Thanks for replying. Unfortunately the vac line you're talking about
isn't the EGR vac line I'm talking about. The one you're talking about
is the CCD line (manual term) and those appear to be fine and easily
traced. I'm assuming it stands for climate control door or something.
When you look at where all of the vac ports are on the fitting assembly
on the intake manifold (looking from the front of the vehicle), the EGR
port I'm talking about is below and diagonally to the left of your CCD
port. The EGR vac line has a similar path as your CCD vac line only it
is a little lower and ends at the coupling just above the oil cap.
That's where it is now anyway, maybe it didn't always rest there when
it was connected to it's missing end. I'm sending pics to try and
help explain.

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