Sias

The front of the USA connection (on trottle body) goes to the valve in the air pump (smog pump) system, I think it is called a diverter valve or gulp valve (?) I will check when i get home, just having a bad day at the office, so i will get back to you tomorrow morning, will take a picture and send it to you.
Sias
85 (US 32v)

GT Jackson

Brian - Got your diagram thanks, can't read your written notes however. Can you elucidate further.

The pass thru from the Thermo Switch connects to "14 - Shift Valve (Below coolant reservoir [BLACK]) from your diagram. I have a black plastic line routing up from below and behind the coolant reservoir to which I assume you are referring.

I initially thought this to be one of the two E&F connections from the "spyder." Hence I only have a single connection from either the AT or EZF control unit. Damn! Almost had this thing buttoned up. What is the EZF, do you know? Also AJR Punp?

Your help is most appreciated.

BrianG

There are 2 lines that go to the firewall from the spider and another from the Brake Booster vacuum line.......... we'll ignore that side for the time being.

The 2 firewall lines are for the EZF and the AT's vacuum modulator valve (shift firmness/timiming). The one in the cetner (over the bell housing) is for the AT. The one over to the right is for the EZF (the ignition moduel) and provides the vacuum signal for the spark-timing control.

The line down to the lower right fender is to the charcoal canister from 14 and is part of the SMOG system, which, through 15, directs gasoline vapor into the PCV system.

If you maen AIR pump, the diverter valve pot is on the right side fender or manifold and takes it's signal from one of the 2 ports at the front of the throttle valve. The left on for 49 states and the right one for Calif. Blank the one you don't use.

GT Jackson

Well hell, I started pulling things off after I thought I had it done, trying to figure this vacuum thing out. Obviously the PO or whoever had this car running one way or the other. but it sure as get out wasn't stock, if'n there is such a thing. Anyway . . .

For one thing I have looked and looked and I only see one vacuum line running over the bell housing back to where I suppose is the tranny. The only other firewall line (for the lack of a better name) runs parallel to the passenger side firewall, dives down past the end of the block and disappears into the dark deep recesses by the right side fender, or so I think.

Can this be the line to the EZF, or ECU as per the manual, whichever, cause there ain't no other line going down, back or no where?

I sure do appreciate your patience with me as I struggle with things that make no sense to my less than mechanical gear head, although I can turn a fair wrench, but these blow-off valves, air bleed valves and diaphrarm valves have me blown off!!!

Tomorrow AM I will try to post some pics of things to see if they jibe with what I think they are, provided my wife and kids haven't given me up for missing.

Thanks

Greg86andahalf

Some pix for reference.

On this first pic, the black line with the elbow in the bottom of the circle is the ECU line. It goes way to the right of where the trans line goes under the firewall.


Here is a pic showing where the trans line starts under the firewall.



I relocated the vac splitter as you will see here. Now I can reach the individual lines for testing and replacement. The splitter no longer sits on the block getting baked by heat. I also ran rigid vac line using paths which make it replaceable without removing the intake.


Here is the diagram for the 85-86 32V engine:

GT Jackson

Greg: Great! That helps tons. I believe my ECU is hooked up correctly which is a big relief. Now to figure why I have the output of the Thermo Switch dead ended which leaves one extra unexplained vacuum connection in the whole setup.

Onward into the past.

Sias

It seems that you are missing the thin hose from the thermo swith (13) to the air bleed valve (14) This valve is between the water reservors and it has been mentioned in earlier posts. "out of confusion will come true learning and wisdom", so just hang in there. I struggled with the same thing for several days. My car is a 5 spd so it does not have the exact same routing at the vac splitter but I pretty much agree with Brian and Gregs' input and the pictures and diagrams they supplied.
Sias
85S (US 32v)

GT Jackson

I want to thank everyone who helped me with this project. Info in this thread, researching this site as well as Nichols tips has been invaluable. As you can see from this picture this 86.5 AT 928 has been through some rough times for its 17 years. Obviously not loved and poorly maintained. The inch of oil and organic matter in the engine valley was enough to make me gag during cleanup. I also need to thank Uncle Sam for grease trap training in preparation.



Most of my time was spent cleaning, not concourse, but at least serviceable. I admit I was most proud of the throttle body, not like new, but at least recognizable. A limited budget did not allow many things to be replaced, however most were still serviceable.



And there she is! Back on the road again. Turned over and fired up immediately. New gaskets, plugs and wires, refurbished injectors, new vacuum lines and a lot of TLC.



I do not have the words to express the difference in the way this car runs. The change is extraordinary. Smooth as silk with power that just keeps coming on, at idle she purrs like a kitten, you hardly notice the tranny shifting as she moves through the gears. And handling, well I don't have to tell you.

I probably paid to much for her to begin with, and the repair costs haven't been cheap, but by Gaud she is a diamond in the rough.

Thanks to all for giving me the nerve to tackle this. Thanks to Rennlist. I've posted more pix and info on the DIY Gang site if anybody is interested. There's more to do, I'll be back.

V-Fib

Well Done GT! Now you can come to my house and give me an inservice on "Grease Trap Cleaning". Going to the kitchen and get a bib, drool...drool.



Anthony Tate
79/928 Silver Metallic

Thom1

Congratulations!!!!

Sias

Great, it all looks very neat, enjoy!!
Sias
85S (US 32v)

SteveG

GT: " I feel your 'sense of accomplishment'" The pics are most helpful.