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  #1  
Old March 14th, 2013, 07:10 PM
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LincolnTC90 LincolnTC90 is offline
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Vacuum line mayhem in engine bay

Does anyone have picture or diagram of TC -90 vacuum lines between upper intake manifold and engine firewall as I forgot to document that part before I janked out the engine for HO conversion.. Fuel line regulator vacuum line color as many other lines I can't figure out from my crappy pictures. Thanks for support already!

Last edited by LincolnTC90; March 14th, 2013 at 07:16 PM.
  #2  
Old March 14th, 2013, 07:59 PM
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There is one hose from the upper intake to the tree on the firewall. The tree on the firewall should have connections out to cruise control, vacuum brake booster, and to the climate control. Climate control is through a check valve, one line goes into the firewall, one over to the vacuum canister with the relays hanging on the side.

Short red plastic line goes to the fuel pressure regulator

longer red line goes to the 3 emissions control solenoids, and it splits over on the fender where the solenoids live.

from the smog solenoids, there are 3 plastic lines, white, black, and green. Green goes to the EGR valve on the throttle body. White and black go to the thermactor (smog pump) control valves, though frankly I don't remember which goes where. If they aren't busted up, it should be fairly obvious where they fit.

There is another line from the evap purge solenoid. This is the round thing hanging in the vacuum line near the battery. Connect that to any vacuum source on the upper intake manifold that it fits on

PCV probably loops through a T fitting on the bottom of the upper intake. It starts on the front side of the intake, goes through the T, and goes to the valve at the back of the lower manifold

MAP sensor goes direct to a port on the intake, preferrably one without any other lines connected to it.

The two connections on the EGR spacer are engine coolant, not vacuum lines.

The elbow on top of the throttle body goes to the oil fill neck on the valve cover.

that should about do it.
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  #3  
Old March 15th, 2013, 08:46 AM
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  #4  
Old March 15th, 2013, 09:07 AM
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Hi LincolnTC90

Here is a diagram for an 89 which may be pretty much the same.




Regards

Dereck
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  #5  
Old March 15th, 2013, 03:52 PM
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I'm impressed, thanks guys!
 

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