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> 2.0 vacuum lines 73 vs 74?, Refresh my memory, please?
Rusty
post Mar 12 2004, 11:14 AM
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Are the 73 and 74 2.0 engine vacuum lines the same layout and positions? (I've never owned a 73 2.0, but all the diagrams out there seem to be for 73 cars.)

-Rusty (IMG:style_emoticons/default/smoke.gif)
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SirAndy
post Mar 12 2004, 12:46 PM
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they should be the same unless a PO has changed something. there were subtle changes in the D-Jet configuration between '72 and '73, so '73 and '74 should be the same.

Andy
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anthony
post Mar 12 2004, 01:10 PM
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The '74 only has one vacuum line coming off the distributor. When I redid my hoses I used the '73 hose diagram as a guide and I had no problems.
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SirAndy
post Mar 12 2004, 01:24 PM
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QUOTE(anthony @ Mar 12 2004, 11:10 AM)
The '74 only has one vacuum line coming off the distributor. When I redid my hoses I used the '73 hose diagram as a guide and I had no problems.

oh, yes, the infamous second dizzy hose ...

the factory had it just lying under the air-filter, unconnected ...

Andy
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garyh
post Mar 12 2004, 01:26 PM
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QUOTE(anthony @ Mar 12 2004, 11:10 AM)
The '74 only has one vacuum line coming off the distributor.

Actually, it's one line coming off the throttle body.

Both vacuum ports are still there on the dizzy, and most installations (IME) leave the hose on the dizzy and drape it over the top of the motor.

Sorry, can't give you better than a 99.9 on that one. (IMG:style_emoticons/default/cool.gif)
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garyh
post Mar 12 2004, 01:28 PM
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QUOTE(SirAndy @ Mar 12 2004, 10:46 AM)
they should be the same unless a PO has changed something. there were subtle changes in the D-Jet configuration between '72 and '73, so '73 and '74 should be the same.

Andy

We're talking 2.0l here. 1972 hose routing won't be real useful (IMG:style_emoticons/default/huh.gif)
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SirAndy
post Mar 12 2004, 01:31 PM
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ah, this could be a classic (IMG:style_emoticons/default/smile.gif)

my 1.8 TB has 2 (two) connectors for both small vac-hoses from the dizzy.
however, there is NO DIFFERENCE whatsoever between hose #2 connected to the TB or just left unconnected.

what does that mean? (IMG:style_emoticons/default/confused24.gif)
Andy
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garyh
post Mar 12 2004, 01:33 PM
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QUOTE(SirAndy @ Mar 12 2004, 11:31 AM)
ah, this could be a classic (IMG:style_emoticons/default/smile.gif)

my 1.8 TB has 2 (two) connectors for both small vac-hoses from the dizzy.
however, there is NO DIFFERENCE whatsoever between hose #2 connected to the TB or just left unconnected.

what does that mean? (IMG:style_emoticons/default/confused24.gif)
Andy

It means that you're not testing exhaust emissions at idle.

That's the only thing the 2nd port was for; to sneak around some weird test.
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SirAndy
post Mar 12 2004, 01:34 PM
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QUOTE(garyh @ Mar 12 2004, 11:28 AM)
We're talking 2.0l here. 1972 hose routing won't be real useful (IMG:style_emoticons/default/huh.gif)

the basic D-Jet vac-hose setup is all the same for 1.7 or 2.0 ... (IMG:style_emoticons/default/wink.gif)

it think what i was trying to say is that there were some changes in the d-jet layout between '72 and '73 and from '73 onward it was the same, therefore the '73 and '74 2.0 should be the same.

makes sense?
Andy
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Chris H.
post Mar 12 2004, 01:46 PM
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QUOTE(Lawrence @ Mar 12 2004, 11:14 AM)
Are the 73 and 74 2.0 engine vacuum lines the same layout and positions? (I've never owned a 73 2.0, but all the diagrams out there seem to be for 73 cars.)

-Rusty (IMG:style_emoticons/default/smoke.gif)

What, you found a '74 2.0L in the Fallujah area in need of new vacuum hoses? (IMG:style_emoticons/default/lol2.gif)

Just kidding Rusty. Hope all is well over there.
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Demick
post Mar 12 2004, 02:44 PM
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Don't forget, sometime in '74 they moved the charcoal canister from the fuel tank area to the engine compartment, so the hoses associated with that are slightly different.

Demick
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Dave_Darling
post Mar 12 2004, 03:43 PM
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QUOTE(SirAndy @ Mar 12 2004, 11:31 AM)
my 1.8 TB has 2 (two) connectors for both small vac-hoses from the dizzy.
however, there is NO DIFFERENCE whatsoever between hose #2 connected to the TB or just left unconnected.

But does it have two connections on the throttle body? If not, then it does not have any way to get "ported vacuum", which is what runs the vacuum advance. So hooking up the vac advance would either do nothing, or advance the timing at the wrong time.

--DD
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SirAndy
post Mar 12 2004, 11:13 PM
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QUOTE(Dave_Darling @ Mar 12 2004, 01:43 PM)
But does it have two connections on the throttle body? If not, then it does not have any way to get "ported vacuum", which is what runs the vacuum advance. So hooking up the vac advance would either do nothing, or advance the timing at the wrong time.

like i said in my post (to quote myself) ...

"my 1.8 TB has 2 (two) connectors"

where TB stands for throttle body. (IMG:style_emoticons/default/wink.gif)

and yes, they're both hooked up right now.
it's just that it didn't seem to make any difference if #2 was hooked up or not ...

Andy
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Dave_Darling
post Mar 13 2004, 03:18 AM
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Shoot, I mis-read it. I only saw "two connections to the dizzy"... Duuuuhhhh...

--DD (Why, yes--I am a blonde! Why do you ask??)
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Bleyseng
post Mar 13 2004, 09:47 AM
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Here Rusty is the pic of the hose layout.

So what r u talking about Andy? On the 73 TB there is two ports and on later TB's one. If yours has two then one goes to the retard and one goes to the vacuum advance. Pulling the vacuum advance hose off does little, pulling the retard hose off does change the idle timing 5 degrees.

Geoff


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Rusty
post Mar 13 2004, 10:22 AM
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Wow, Geoff... great picture! Thanks!

-Rusty (IMG:style_emoticons/default/smoke.gif)
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