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RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections.

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Old 02-08-2010, 04:08 PM   #1
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Alright 88 s4 turbo. The temp sensor on the t-stat neck. Mine is there trouble is the wire broke and I want to reconnect it and I don't know where it's supposed to go to. Pics would be awesome.






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Old 02-09-2010, 11:22 AM   #2
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Come on guys, im tryin to get this thing back on the road by the weekend, i also need to know where the vac line from the BOV, and the pressure sensor goes on the motor i think i got it backwards. I want all this straight before i try to start it after like 3 months lol
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Old 02-10-2010, 05:30 AM   #3
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Originally Posted by Rx-7fetish View Post
i also need to know where the vac line from the BOV, and the pressure sensor goes on the motor i think i got it backwards. I want all this straight before i try to start it after like 3 months lol
Stock wise...
The stock boost sensor goes to a fitting on the ACV valve.
The stock BOV goes to a fitting on the flange on the upper intake manifold that mates with the lower intake manifold - this fitting is hard to see, cause it's under the stock BAC valve.

If you blocked off your ACV, then you just lost one of the fittings.


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Old 02-10-2010, 12:52 PM   #4
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Nothing is blocked on mine, its all there, so what fan exactly does this go to? Still unfamiliar with all the extra crap on turbo cars, im used to n/a lol, and thanks for the pics guys! So what exactly does the acv do? could i theoretically cap off the vac lines on and to it, unplug it and use it as the block off plate, cause i dont have an air pump as of right now.

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Old 02-09-2010, 09:48 PM   #5
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Just for you, I went out in the cold to take this picture :P

I have my BOV, boost gauge, and MAP sensor all tied to that one nipple on the UIM. Works great. Just MAKE DAMN SURE you have a restrictor pill before the MAP sensor, and it wouldn't be a bad idea to have one before the BOV. One for the boost gauge isn't NEEDED, but you can do that, too. Just in case I would recommend a separate pill for each thing, using the stock restrictor pill for the MAP sensor, as that was its original intent. I stuck a piece of a vacuum connector in the line for my BOV, and I don't remember if I used one for my boost gauge. Doesn't hurt anything either way with the gauge. Damn, now my hands smell like rubber.
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Old 02-09-2010, 10:06 PM   #6
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Oh crap I forgot you wanted the wire, too... Look for a loose wire under the IC somewhere, you might have to pull it off. There's a wire loom running behind the alt for all sorts of stuff like that temp sensor, the alternator, solenoids... If you have part of the wire on the plug end you can match it, and hopefully there aren't too many loose wires floating around. If there are you have other issues you need to address.
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This is why I don't do politics, it's just one stupid thing after another.
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Old 02-10-2010, 05:29 AM   #7
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Alright 88 s4 turbo. The temp sensor on the t-stat neck. Mine is there trouble is the wire broke and I want to reconnect it and I don't know where it's supposed to go to. Pics would be awesome.
I believe that wire is only for the electric fan?
It's a thermoswitch and not a true thermosensor.


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Old 02-10-2010, 11:14 PM   #8
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You could make your own blockoff plate if you want to be cheap about it. I'd just remove the ACV if you don't plan on reinstalling the air pump because I think it exists only to direct the air pump's output. It was also one of the very first things I pulled off my car because I didn't want/need it and I don't recall all the details.
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Old 02-11-2010, 06:56 AM   #9
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Okay since I'm lacking an air pump and don't have any metal at the moment to make a plate, if I just unplug the power to the acv but leave all the vac lines on it will the pressure sensor still get a correct reading? Not gonna leave it like that just temp till next paycheck or I get a hold of another street sign for scrap metal lol

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Old 02-11-2010, 07:51 AM   #10
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I would use a different vac nipple for the MAP sensor that you know gets the true after TB reading. But then that nipple on the ACV might do just that. There might be a hole that goes straight from the UIM through the ACV to the nipple. You could check for that by pulling it off and inspecting.
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Old 02-11-2010, 11:25 AM   #11
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Okay, next issue lol what goes on this this vac nipple? from what i have read it also goes to the acv, but i cant find anymore nipples on the acv.


And i just found this lol, its the wires to the acv, it was all wrapped in electric tape.

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Old 02-15-2010, 05:47 PM   #12
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Quote:
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I dont want to start a new thread for this guys, i have a vac leak almost 100 percent, and have no idea where its at except that its the other end of wherever this vac nipple is connected to. Someone has to know, or can go look and snap a pic for me.
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Old 02-11-2010, 05:29 PM   #13
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OMG someone killed it with FIRE! If that were my car this would encourage me to remove the ACV altogether.
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240+ rwhp on my DIY streetport, ~13psi on stock turbo, Racing Beat REVTII exhaust
rTek 2.1 awaits a tune

Quote:
Originally Posted by need RX7
This is why I don't do politics, it's just one stupid thing after another.
360 gamertag: quick Tii
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Old 02-11-2010, 08:58 PM   #14
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It's just that little bit and I'm gonna get a block of plate made or bought next paycheck but until then.... WHERES THAT VAC NIPPLE GO! Lol 1 day left till weekend I'm sill shootin for my same goal
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Old 02-11-2010, 09:52 PM   #15
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Wait, my old exhaust manifold had that flapper thing, (twin scroll?) anyways my new one doesnt have it, is that the vac source for it? i cant remember.
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