whats this??

Jbagel2 · 03-03-2006, 08:43 PM

i've started haveing little issues with my 74 2.0 ie.. my warm idle has droped, enough that i can feel the car shake... not sure what happened, wondering if it might be a vacume line issue, also have picked up a fairly load clicking and clanking noise from the front of the engine on the drivers side.... if its where i think it is it sounds like it is comeing from the alternator area...... and i found this little port (while looking for a vacuum line problem ) that nothing is connected to but i feel air being blow out while the engine is running

i feel air moving out pretty forcfully and i'm not sure what is supposed to be there if anything... with it being where it is i don't see how dirt doesn't get in it so something must go there?

Jbagel2 · 03-03-2006, 08:47 PM

plus some of my vacume lines arn't plugged in how Dave Darling's 2.0L D-jet Hose Diagram shows they should be... should i move them? it was running fine with them where they are untill just recently

Conrad W Peden · Conrad W Peden's Garage

Breather for your valve cover/rockers.

Goes to your air cleaner via the spark arrestor (?)....its right beside your oil filler

Jbagel2 · 03-03-2006, 11:00 PM

ok that makes since... then where does this hose go??

Jbagel2 · 03-03-2006, 11:01 PM

Jbagel2 · 03-03-2006, 11:02 PM

the end that is not pluged into the fan shroud?

Jbagel2 · 02:19 AM

after i posted that last diagram i went out and looked at my car... and i think that mabey 2 of all of my vacuum hoses are hooked up exactly like the diagram shows... ????????? is there any reason that they would be hooked up differently?? my decel valve is hooked up completly different. please help!! haha

Dave at Pelican Parts · Dave at Pelican Parts's Garage

The fitting you show looks like the one that the green hose on the right side of the diagram goes to.

Vacuum hoses--
There are four "flavors" of vacuum that our cars use. One is "ambient air pressure". The 2.0 cars get it from the air cleaner. All of the air cleaner fittings are equivalent to each other.
The next type is "manifold vacuum". This comes, quite appropriately, from the manifold or the plenum. All of the fittings on the manifold are equivalent to each other, as far as vacuum is concerned.
The third type is "ported vacuum", and it applies to the vacuum advance fitting on the right-front of the throttle body only. If you don't have a fitting on that section of your TB, don't worry about this.

The fourth kind is "not really part of the vacuum system". The lines to the charcoal cannister (the ones in the upper left corner of the diagram) are these type, as are the ones to the cylinder head breathers. These are ones that won't really cause running problems if they're disconnected, but you can (will) create something of a mess if you don't have them hooked up.

I hope this helps to some extent.

--DD

Jbagel2 · 03-04-2006, 08:38 PM

so then if i go ahead and replace all my vacuum lines.. theres no reason i shouldn't put them in the order of the diagram??

Tobra · Tobra's Garage

My car had the lines hooked up correctly, and I replaced all of them. It made a noticeable improvement how it ran, and I have noted this on L jet vehicles as well