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help with vac lines on bbm photo inc hopefully!! 

 

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 Post subject: help with vac lines on bbm photo inc hopefully!!
Posted: Sun Apr 15, 2007 9:08 pm 
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need to know where these go car is ea with ef motor
two lines of bbm switching valve went through fire wall of ef but my ea dosent have these can I just block these off or join them together?
next one is the black line that comes through the fire wall allong with agreen one I know the green one goes to the heater tap where do I put the black one onto the ef motor?the final one is old cfi tps plug my cfi motor had 2 of these one left with old loom these one stayed with lomm that went into dash under brake booster
can I just leave disconnected or should I join to new tps ?why would there have been 2 on cfi?
cheers for any help mike 8-)

 

 

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Posted: Sun Apr 15, 2007 10:30 pm 
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Well the bottom left goes to the MAP sensor which sits on the firewall.
The black line that goes into the cabin is vacuum for the ventilation controls - you need to fit a check valve (black blue coloured), the other is for the BBM vacuum solenoid (sits behind the washer bottle) - this runs the vaccy line that runs to the front of the BBM.
The two above go to the vacuum tree that the brake booster hose goes to.

Don't forget about the vacuum tree below the throttle body (PCV and charcoal canister).
I'd say it's best to have a look at an EF/EL and pull the washer bottle out.

 

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Posted: Mon Apr 16, 2007 5:03 pm 
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the 2 on top of bbm switching valve went through fire wall behind dash not towards brake line as you mentiond
and whats a check valve ?I thought the black vac hose would just need to be connected somewhere
any ideas about extra tps from cfi??????
so close to trying to start just waiting on smartlock bypass and a couple of wireing connections :D

 

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Posted: Mon Apr 16, 2007 8:25 pm 
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BUMP ANY BODY :)

 

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Posted: Mon Apr 16, 2007 9:47 pm 
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fordster wrote:
the 2 on top of bbm switching valve went through fire wall behind dash not towards brake line as you mentiond
and whats a check valve ?I thought the black vac hose would just need to be connected somewhere
I'll say it again - I'd say it's best to have a look at an EF/EL and pull the washer bottle out.

 

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97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

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Posted: Tue Apr 17, 2007 10:03 am 
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ill take a photo of mine for you today..
i got rid of all those hoses that are on the bbm release solinoid and just used the blue valve and a hose into the release solinoid and a hose out to the manifold diaphram..
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Posted: Tue Apr 17, 2007 10:44 am 
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here is a pic
and a quick diagram of how mine is connected..

 

 

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vacc hose pic.jpg
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Posted: Tue Apr 17, 2007 7:06 pm 
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cheers troyman yet again your infos bang on what I need :D
any ideas about left over tps from old motor ?would it have something to do with getting info back to the 4 speed auto? Im unsure but its going back into dash for something might just have to see how it goes without it
Not to long now be able to see if she fires :twisted:

 

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Posted: Tue Apr 17, 2007 9:49 pm 
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The check valve in the diagram needs to be in the heater controls line.

 

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Posted: Tue Apr 17, 2007 10:00 pm 
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snap0964 wrote:
The check valve in the diagram needs to be in the heater controls line.


does it?

i thought it was there to hold the vacuum to the solinoid switch so when you use w.o.t (wide open throttle)at low rpm the diaphram will not loose vacuum..

but i guess it would work the same for the heater controles but ive never noticed if my heater controles loose vacuum when i use w.o.t at low rpm?

so you have got a good point there!..
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Posted: Tue Apr 17, 2007 10:20 pm 
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well anyway here is another diagram you could connect it this way also.
that way you dont loose vacuum to your heater controles or the bbm diaphram..

 

 

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Posted: Tue Apr 17, 2007 10:48 pm 
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TROYMAN wrote:
i thought it was there to hold the vacuum to the solinoid switch so when you use w.o.t (wide open throttle)at low rpm the diaphram will not loose vacuum..
You make a good point - but the thing is that at over 3800 RPM (VSV will cut vacuum to the butterflies), the check valve will hold vacuum and the runners won't change over (unless the check valve is leaky).

TROYMAN wrote:
but i guess it would work the same for the heater controles but ive never noticed if my heater controles loose vacuum when i use w.o.t at low rpm?
There's been a few threads on this - best way to test this out is to go up a hill and accelerate.

That junction plug near the washer bottle can be confusing, that's why I suggested the guy actually have a look at one. AFAIK, the check valve sits in the heater/CC control line.

 

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97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

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Posted: Tue Apr 17, 2007 11:08 pm 
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ok

my release solinoid releases the vacuum through the base of the solinoid when the ecu cuts power at 3800rpm..
but i have noticed if i remove the check valve the manifold will switch over as soon as i use enough throttle to loose manifold vacuum thats why i conected the check valve that way. :?

i know mine is working but i dont know if its the way ford wanted it to work..
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Posted: Wed Apr 18, 2007 12:50 am 
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Hmmm - **Scratches Head **
When I did my XH BBM conversion, I did check out the vaccy connector block and compared it also with my EL wagon one, because I wanted to rationalise some hoses as the XH already had the check valve under the dash. As I say I'm pretty sure the EF/EL check valves are only in the heater vaccy line - but the point you make about low vacuum is a valid one, so another check of this is in order.
BTW: Doesn't the canister line go to the vaccy tree below the throttle body ??

 

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97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

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Posted: Wed Apr 18, 2007 1:58 pm 
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snap0964 wrote:
Hmmm - **Scratches Head **
When I did my XH BBM conversion, I did check out the vaccy connector block and compared it also with my EL wagon one, because I wanted to rationalise some hoses as the XH already had the check valve under the dash. As I say I'm pretty sure the EF/EL check valves are only in the heater vaccy line - but the point you make about low vacuum is a valid one, so another check of this is in order.
BTW: Doesn't the canister line go to the vaccy tree below the throttle body ??


hmm i dont have a vac tree below the throttle body only the one near the fuel reg..
there is only the fitting for the pcv hose under the throttle body..
but ill have a look at how the check valve is conected in a el..
as i didnt have a el to see how it was conected when i did mine. so i just fiddled around till i got it to work...
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