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Old 06-01-08, 08:19 AM
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Vacuum diagram question

I've got the UIM off to change the secondary injectors and figured I'd take care of the rats nest as well. I have 2 questions, on the front of the UIM where the 3 vacuum lines come in, in the picture there is a partial line and I can't tell where it goes. It's the top of the 3. Second question; what about the lines that connect to the TMIC?
Attached Thumbnails Vacuum diagram question-s4emissionsremovalq.jpg  
Old 06-01-08, 09:24 AM
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From the diagram provided it shows it going to the check valve in the lower right hand side.
Old 06-01-08, 02:08 PM
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Q1 look at the red aarow. This vac line is for the twin scroll actuator. It is needed.


Q2 Put the TMIC back on like normal. You are talking about the lines right above the UIM on the ic right?
Old 06-01-08, 05:47 PM
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Originally Posted by freemanrx7
You are talking about the lines right above the UIM on the ic right?
Exactly. I left the BAC on and didn't do the TB mod so I still have lines going to the TM from the TB.

Great, I got it done. Thanks.
Old 06-01-08, 06:27 PM
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Your car looks just like mine.

So did you get her running?
Old 06-01-08, 07:12 PM
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got any ther diagrams like this
Old 06-01-08, 10:50 PM
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Originally Posted by freemanrx7
Your car looks just like mine.

So did you get her running?
I didn't. But, I'm waiting for my block off plates to come in before I put the UIM back on. Once their in, I'll bolt the UIM back up. Other than the plates, I'm done under there.

One thing I wanted to do was test the injectors for leaks. I've been looking for the plug that I'm supposed to jumper so that it will only charge the fuel, but I'm having a hard time finding. Help?

Originally Posted by Nephilim
got any ther diagrams like this
I don't sorry. I got this one from this forum.

Last edited by shoafer0; 06-01-08 at 10:58 PM.
Old 06-02-08, 11:31 AM
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If they have never been touched since the factory I would recommend you send them to a shop and have them prof cleaned.

Another thing to check is the fuel pulsation dampner. They are prone to leak on the 87-88 model. Unfortunately an s5 version is $$$$$
Old 06-02-08, 12:21 PM
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Originally Posted by freemanrx7
If they have never been touched since the factory I would recommend you send them to a shop and have them prof cleaned.
They are brand new bosch 750s. Bought them from KGparts. The injectors should be fine, I just wanted to make sure that there were no leaks.

I read that the Pulsation Dampener can cause problems. I did check it. Everything seems to be in great condition.
Old 06-02-08, 02:17 PM
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Originally Posted by shoafer0
One thing I wanted to do was test the injectors for leaks. I've been looking for the plug that I'm supposed to jumper so that it will only charge the fuel, but I'm having a hard time finding. Help?
the plug is a yellow, two prong, female connecter located by the pass. shock tower, it may be buried but its there. Mine had a black rubber boot on it.
Old 06-02-08, 02:26 PM
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Originally Posted by well uhhh
the plug is a yellow, two prong, female connecter located by the pass. shock tower, it may be buried but its there. Mine had a black rubber boot on it.
It must really be buried because I looked for it there for a good 5 minutes. I'll look again. Is there anything that it's close to other than the pass. shock tower that I can look for?
Old 06-02-08, 04:54 PM
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Originally Posted by shoafer0
It must really be buried because I looked for it there for a good 5 minutes. I'll look again. Is there anything that it's close to other than the pass. shock tower that I can look for?
See the purple circle? It's there or close by.
https://www.rx7club.com/attachment.p...3&d=1211498671
Old 06-02-08, 05:14 PM
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Originally Posted by HAILERS
See the purple circle? It's there or close by.
https://www.rx7club.com/attachment.p...3&d=1211498671
Awesome! I'm going to look for it when I get home from work.

Love this forum. Thanks for the help.
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