rx7gary

I had a small fuel fire which burned out all my vacuum lines and some electrical. I have replaced the wiring, all the o-rings on the injectors, did some massive cleaning from the fire extinguisher and now have to figure out the vacuum lines...

All the oilers are back in vacuum, and some of the basic lines are figured out.

What I need help with:

(1) The subzero valve has two vacuum ports in it, where do they lead to?

(2) There are 7 vacuum ports coming out of the tubed "spyder".
The back line that points downward goes to the switching actuator.
there are 5 lines in a row. Which one goes to the fuel system pressure regulator? It appears from the diagram in the FM page 4B-5 that the last one (facing the passenger side of car) goes there. The other 4 then go to the other tubing system? That leaves one more tube going over towards the oilers which seems to be routed to the lower intake manifold below the subzero valve.

Any help or clearer diagrams would be greatly appreciated. I wanted to finish up putting this car back together today.

rx7gary

Did i mention that this is a 1987 Turbo II and everything on it is still factory?

if anyone has a link to some diagrams, or past threads that have more info (I did the search and came up a little short)

slpin

iTrader: (9)

pop da hood and lok at da ****!!!

rx7gary

who do you think is doing the work slpin? find me another turbo II in the area might help

yeah the frustration has set in.... help???

jimmyv13

The vacuum diagram is in here:

http://www.teamfc3s.org/main/factory...TEMS_TURBO.pdf

Take the sub zero out, throw it away, and cap the vac sources. It was recalled by Mazda.

slpin

iTrader: (9)

like i said
pop the hood and look at the vacuum tube diagram on the hood

rx7gary

Thanks Jimmyv13 I have the FM in hardcopy from years ago, when I put a new engine and turbo in the car. I do not know what "sources" to cap off, since I am still not sure which line goes to what source.

slpin... thanks, but I do not have the vacuum diagram on the hood, just some specs on lubricants, etc.

will keep on trying....

rx7gary

here are some pics for the routing problem, since I know that most can visualize ...

1 is a steel tube from the upper assembly of vacuum lines
2 through 6 is the lower set that I do not know how they match to the upper tubes
I think 6 goes to the fuel pressure device, is this correct, or is 2 the correct one?

7 & 8 are from the sub zero device, and I have no idea where they go... once I know that, I can decide if i need to cap them off as per above conversation. Climate in NJ rarely goes that low (3 deg) anyway.

See all the new lines? i have been busy ....

rx7gary

picture

rx7gary

still looking for some advice on this one

kel

If you still need help, I can send you my extensive photo set from the top end of the '87TII. I re-worked all the rubber a couple of years ago and documented it with my digital camera so I would know how to put everything back together.

Drop me a note with an email address and I can send you a zip file.

- k -

rx7gary

i did not get it back together today as planned

maybe i have some help on the way

thanks, any thoughts out there on this one?

DR_Toast

iTrader: (1)

if you still need help, send me a PM and I'll send you back a 30 second video tour of my vac lines. That should clear things up a bit.

rx7gary

Okay taking the offer to get the video.... I hope that I can get it completed soon, since this is the only thing holding up me running this car again...

anyone with help on the vacuum lines that don't really show up in the Factory Manual real well, please give me a shout

Thanks in advance

buttsjim

I have these pics of an 87 TII that may be helpful...

buttsjim

One more:

rx7gary

Great pictures, that helps me with all the questions I had except the stupid sub zero device, that I know does not work, but I was going to leave it on since the car is totally stock still. I think I have that figured out also, but I will wait on a few more leads before I button it all up....

Thanks again buttsjim

buttsjim

If you look on the picture just above your last post, you can see where the sub-zero device mounts to the upper manifold. Look at the pic between the primary and secondary fuel rails, and centered between the two secondary injectors. You can see a bolt with a large washer holding a piece of sheet metal to the manifold. That's my blockoff plate for the cold start assist device. Too bad, but I don't remember where the vacuum source was.

I didn't get rid of my unit, as I also wanted to maintain a stock setup. It's in a box, somewhere, in my cabinet.

Good luck!

rx7gary

Yes, I caught that block off plate action. What I was looking for is where those lines went, so that I can make sure I do have the leftover nipples accounted for. I believe that one goes to the UIM, 2 above the Oiler connection, and the second was to a blocked off steel tube behind the mainifolds.

Looking for some confirmation on that. I figured out everything else. I am going to photo document just as you did, so that someday I might be able to help others, as you did me.

Thanks again....

pointman

Could anybody tell me where the other end of this blocked off like goes to? I circled the line in question in red.

rx7gary

Hey pointman, that is what I think ends up going to the subzero valve, i have the same configuration question. The other end of that line is my number "1" in the above picture that I posted. The second nipple, i think, ends on the subzero valve ends up at the top nipple on the UIM above the oilers line and the primary air line from between the main injectors....

This is the final question to my dilema for the vacuum subzero hookups... All the other lines are in buttsjim's pic's and the FSM

pointman

rx7gary, was the other end of your line capped like the line in the picture? Mine has always been capped so I'm not sure if a previous owner capped it or if it came from the factory capped.

rx7gary

pointman, the other end was not capped... think it was connected to the subzero valve, that is what i am trying to track down. If this is the case, you can just disregard the whole line you are questioning.

did you have a cap on the back of the manifold where the 4 nipples come out of the throttle body (UIM)??? Do you still have the subzero stuff or is yours already blocked out?

pointman

The part I circled in the pics was capped just like the pic and the end on the back of the motor that you think goes to the subzero valve was broke off. Now that I think about I believe you are correct in saying that it goes to the subzero valve I'm just wondering if having it uncapped at the subzero valve would cause problems on my engine? I have my idle turned up abit and have no problems but I've never been able to have a good idle at 750 where everyone says it should be and I'm thinking maybe having it uncapped at the valve is whats causing it.

buttsjim

The capped line that you circled came that way from the factory. I don't remember where the other end goes.