So in an attempt to identify the sources of numerous vacuum leaks and random hoses, I felt I had no choice but to remove the upper intake manifold. The motor has been taken apart before by the previous owner for a rebuild, so many things are missing, have been replaced, or somewhere in between. Here are the pictures:
1. What on earth is this? I peeled it back and it seems to be blocking off something. This became visible once the IM was removed. There did not appear to be any sealant, but there was definitely something holding it down.


2. I believe this is the air supply solenoid? What does it do? That little arm to the right had nothing connected to it.


3. This large vacuum line comes from off the firewall. I believe it connects to the largest diameter port in pic 4.


4. The mysterious vacuum ports from my previous post. I believe the hose from pic 9 goes into the middle port, but what goes on the bottom?


5. No clue what this thing is, but I believe the vacuum hose seen in the background goes to this.


6. These are right below/behind the alternator. No clue what should go to the bottom 2 ports.


7. Top shot of pic 6.


8. Damaged air supply solenoid harness. Can the air supply solenoid be deleted? If not I can repair the harness.


9. This vacuum line goes into some sort of vacuum splitter?


10. This is obviously the charcoal canister. Is this bottom hose supposed to drain to nothing?


I tried looking in the FSM, but I didn't really see anything of help. I could have been looking in the wrong section though because it seems that the manuals posted online are all broken up into different parts.

 

Let me clarify, this is an 88 TII.

 

Pic #5. Oil injector spider.

 

#1 looks like the clutch inspection cover

 

My clutch inspection cover has a gap in it too, I wasn't sure if I should seal it off better. #2 is the air supply valve, mine was disconnected by the PO also. I was going to remove it but have read multiple places that I need it if I run ac but haven't figured out why.

 

If you are running the A/C it puts a load on the engine, the ASV compensates for this by allowing more air in to stabilize the idle keeping it from stalling. Yes you should repair the wires for the ASV as lights and fans put a load on the engine as well.

 

Mine is a S4 engine in an 85 GSL-SE being controlled by a MicroTech LT10s. Any idea what originally controlled the ASV? Was it controlled by the ecu? If so I'm not sure how I could run it with the MT ecu.

 

Should something be connected to the arm of the ASV, or does it do it's thing inside the manifold?

 

It is all internal.

 

Check out http://rotaryresurrection.com/2ndgen...s_removal.html
This might help, at least a little.