Hey all, I'm basically done dropping my new engine in my 88 T2. I am at the point where I need to start attaching vacuum hoses and I've come to realize that the diagram on the hood/in the FSM really sucks. I've gotten a few of them (I think) but I want to make sure they're all right, so, I was wondering if anybody has actual pictures of all the vacuum lines on an S4 (yeah I know theres a lot, but it'd be mighty helpful) or a link to a better diagram. Thanks very much in advance.

-David Guy
dguy@andern.org

P.S. I did search, however I didn't find any posts that touched base on all the hoses/nipples.

 

http://www.iluvmyrx7.com/2nd_gen_manuals.htm

 

Thanks, but as I said the diagram in the FSM (I've got one) and under the hood really suck, what would really be awesome is if someone had a few pictures of all the vacuum routed with the UIM off. Thanks.

-David Guy
dguy@andern.org

 

I know this is after the fact, but this is why you should REALLY label and take pictures of everything before you tear an engine down. I did this on my first rebuild, and didn't have a lick of trouble.

That said, the S4 NA's really don't have that many lines, and most are on the metal vacuum spider. If you still have the stock lines on, they're usually baked into shape so they'll only reach one spot.

I don't know how far you've got putting it together, but everything really lines up pretty easily. If it looks like it goes somewhere, it probably does. And, I don't think if you put a vacuum line on the "wrong" nipple, you'll have a major problem.

Dale

 

Alot of times, moreso on the S5 NA, a cluster of lines all go to the same vacuum source, so it shouldn't make a difference where they go. This probably doesn't help at all.

 

Errr....I beg your pardon about not mattering where they go. All those lines do not get or have VACUUM on them. As an example the acv has three lines on it. Only one is vacuum. The other two are pressure lines that come and go from the relief solenoid. Another example is/are the line to the fuel injector air bleeds and the oil injector spider/nipples. Neither of which is a vacuum line.Both are ambient pressure lines. Not vacuum.

Just reason out where the lines go to. Most of those that are ganged together at the rear of the engine come from the orange, green, blue, yellow, grey solenoids. Go to one solenoid at a time and blow into one of the two pipes at the solenoid and see which pipe the air comes out of. Now you know where the other end should go. Both of the pipes at the relief solenoid(blue) go to the acv. One of the switching(grey) solenoid pipes goes to the acv. One of the pipes at the orange solenoid(fuel pressure solenoid) goes to the fpr. One of the pipes at the green solenoid(turbo switching actuator)goes to the switching actuator on the turbo.

On a series four,(remember, I said series four, not five) at least a 87turboii, the four nipples on the back of the throttle body are not vacuum sources. The only one that is vacuum is the bottom one. The top three are ambient pressure taken from the front of the throttle plates.

The best thing you can do, is buy a Cuban cigar of good quality, and blow smoke in the metal lines to see where they come from. Then you should know, or be able to figure out, their destination.

 

SO a cheap 'knock off' won't do eh?!

 

I wish I had an example, but I don't. I see what your saying, but there were a few lines on an S5 engine I did that went to the same source, just at different (very close) points. On the S4, there are 2 lines on the front of the dynamic chamber that look like they could be interchanged, but I'm not sure.
Again, I don't think this will help at all. I'm just trying to get as many posts as hailers. I don't even have an rx-7.

 

Really, the vacuum lines ARE specific, but I was trying not to scare the guy too bad . Basically, even with the vacuum lines hooked up wrong, the car will most likely start, run, and drive. There are some exceptions, but that's assuming you were at least CLOSE in hooking them up and didn't get way outta control.

Dale

 

You need to stop talking. It's people like you that keep flooding the forum with mis-information. If you want to up your post count do it in the lounge. Vacuum lines are very specific. With that said I completely removed my vacuum spyder.

 

i agree with hailers 100%. what i di with mine was bust out the book and go to the individual component. so you look at the acv, and it will tell you what solenoid to test for what part of the acv. then you make the vacuum lines connect. mine went from flooding every hot start, to starting hot better than cold

mike

 

Lounge posts don't count ...

 

StarionX......its gotta be a Cohiba, or you'll get the lines crossed.

dag.....in a way my first answer does not help you much, but I've tried to describe how and where each line goes on a turbo, and it really does not work for me. Blowing smoke seems to be the best way if you don't have another car handy to copy cat off. Sorry 'bout that. No offense meant.