First, I've spent 3 or 4 hours going over the Engine section, Fuel and Emissions section of the FSM, as well as Mazda's exploded parts diagrams looking for the answers as well as the color coded vacuum diagram, so if you're going to refer me to one of these, please point me at a specific section, or describe the routing to me in words because I haven't been able to find my answer yet, and I have looked.

My engine blew a water line under the LIM, so while I had the engine torn down I've been replacing all my water hoses and vacuum lines and fuel lines, as well as the OMP lines and anything else that looked questionable. After getting it almost all back together, this is what's left. These are the only ports that are open, and I'm 99.9% sure everything else is as it needs to be (I disassembled one engine while I put this one together to confirm) Part of the problem is the engine that's being rebuilt has had all the emissions removed as well as some other interesting things done to it plus ran not so well, so some of these lines are capped and some were just plain off.

For Outlet 5 - the car is a manual so the thermoswitch only has two nipples (or will have, when the new one comes in) And it is an S4, normally aspirated.

Thanks in advance for your help.

 

4........is for the pressure sensor on the right front strut tower.

3.........is for the split air pipe that runs to the catalytic converter

2........I use for the cruise control (memory there).

5..........sorry,I never had a double throttle diaphram that worked. I know there is a delay valve b/t there and the water thermo valve.

 

For the double throttle ...........go here http://wombat.sevarg.net/RX7/RX-7_Tr...%20Systems.pdf and download that. If you look at some of the pictures you can tell where things go...maybe.

 

It wouldn't hurt to download most of these since you have a S4 non turbo.... http://wombat.sevarg.net/RX7/RX-7_Training_Manuals/

 

Awesome - you've helped me out a bunch! Although I actually already have all the service manuals saved locally in PDF, as well as the parts lists from Mazda. That also makes me feel better about not being able to figure out where they all go, because with the engine out of the car it's not so obvious. #3 - that makes sense now! That's where the air pressure goes in to open the 5th and 6th ports, right? I wondered about that. Seeing the banjo bolt made me want to think oil went in there, but I never really understood where the pressure fed from to actuate those valves. That explains it! Ha! The more you find out about this engine the more genius it is!
Any ideas on picture 1?
If I ever run across you since I live right across town from you, I owe you a drink!

 

So if there's a delay between the double throttle plate and the thermo-valve, but it opens both at the same time whenever it's disconnected, that would mean it's basically just using the air pressure in the lines to resist the opening of the second throttle plates when it's cold, but when warm it just vents to air which would let it open faster?

 

I apologize! That's not the FSM, that's completely different. This is awesome, thanks!

*edit* I also want to take a minute and thank Aaron Cake, too. After an hour and a half of searching for vacuum diagram and vacuum ports and every combination of anything relevant and weeding through 300+ posts that are APPARENTLY only relevant to TII's, it's incredibly nice to just get an answer to the question instead 15 posts telling me to RTFM or Search. So thanks Aaron, and thanks Hailers, you two are truly awesome.

 

5 goes through a one way check valve routed under the tb
1 is a direct line

 

I may be mistaken, but isn't that a Delay Valve instead of a checkvalve???????? Or are they the same thing under a different name.

One other thought about that. PUt a vacuum line on the double throttle diaphram and see if it will hold a vacuum and move when you suck on that line. If the diaphram is no good you may want to forget about routing a line to it. Just a thought.

 

I may be mistaken by calling it a check valve, I should have just called it the green bulb.

 

Awesome, thanks again for your help guys! So still no ideas on outlet 1 from the first picture that comes off the firewall side of the intake manifold?

 

When the waters cold, the vacuum is sent to the double throttle diaphram to hold the outer set of throttle plates closed. When the water warms up the vacuum source is cut off to the double throttle diaphram and the outer set of plates are driven wide open by the spring in the double throttle diaphram.

I think the delay valve is there to keep a steady vacuum on the diaphram during large throttle pedal movements when the car is cold.

I'd look at my 86n/a but it won't do any good since I know I've never had a working double throttle diaphram so I just capped off the hose to it and the water thermo valve. I've no real memory of how the hose were originaly routed.

 

Hailers ... thanks for all your input and wisdom on vacuum lines ... got my 87 TII running last night ... now I see how many different vacuum line setups exist, and I will continue to work on documentation using these guys photos and factory/other diagrams ... Richter12 good luck