2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Block-Off Emissions Done, A Few Questions....

Old Jun 18, 2004 | 06:16 PM
  #1  
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Block-Off Emissions Done, A Few Questions....

Well, I finished slapping on the blockoff plates on my S4 TII. I have a couple of questions.

Going to the ACV were a couple of vacuum lines, I capped those off, but my boost sensor/boost gauge were hooked up to this. Where can I hook them up now? Also there was a big air line that used to be hooked up to the acv, Its kind of long, what can be done with this?

Oriinally, on the bac there was an electrical connection, what do I do with this? Can I just leave it there, hidden?
Also on the bac theres a coolant line that used to lead there, can that line just be capped?

Thanks for your help ahead of time.
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Old Jun 18, 2004 | 06:24 PM
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Re: Block-Off Emissions Done, A Few Questions....

Originally posted by MazdaRx7Racer4Life

Going to the ACV were a couple of vacuum lines, I capped those off, but my boost sensor/boost gauge were hooked up to this.
Any vacuum nipple on the UIM should work for this.

Also there was a big air line that used to be hooked up to the acv, Its kind of long, what can be done with this?


thats what I think is "relief air tube" You can remove it. It vents unused air from the air pump.


Oriinally, on the bac there was an electrical connection, what do I do with this? Can I just leave it there, hidden?
Also on the bac theres a coolant line that used to lead there, can that line just be capped?

Thanks for your help ahead of time.
Tape off the connector, and stash it somewhere. No reason to remove it.
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Old Jun 18, 2004 | 06:32 PM
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hey, thanks alot for your quick reply man.
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Old Jun 18, 2004 | 06:39 PM
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Sure...
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Old Jun 18, 2004 | 09:35 PM
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Originally posted by MazdaRx7Racer4Life
Going to the ACV were a couple of vacuum lines, I capped those off, but my boost sensor/boost gauge were hooked up to this. Where can I hook them up now? Also there was a big air line that used to be hooked up to the acv, Its kind of long, what can be done with this?
See those flashing lights? That's the search police coming for your *** for not searching for info on a topic that's been done to death...

Searching for "ACV in the 2nd Gen forum under my user name got 104 hits. Here's just a few, in which your questions are answered several times. There are many more.

https://www.rx7club.com/showthread.p...hreadid=314870
https://www.rx7club.com/showthread.p...hreadid=291550
https://www.rx7club.com/showthread.p...hreadid=247742
https://www.rx7club.com/showthread.p...hreadid=283961
https://www.rx7club.com/showthread.p...hreadid=172483
Also on the bac theres a coolant line that used to lead there, can that line just be capped?
Why are you removing the BAC valve? It's for idle control, it's got nothing to do with emissions. And if you haven't done the TB mod, you cannot remove that coolant line.
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Old Jun 18, 2004 | 09:46 PM
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Don't remove the BAC. Your idle (control) will suffer.

There is many a day, when I wish my Wolf3D could control the BAC, so I could have it back

Last edited by eViLRotor; Jun 18, 2004 at 09:51 PM.
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Old Jun 18, 2004 | 11:07 PM
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blah to searching
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