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

S5 NA air pump issue "no cats"

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Old Apr 15, 2012 | 09:04 AM
  #1  
ER34's Avatar
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S5 NA air pump issue "no cats"

Ok I've searched and searched and searched, here is my setup so lets get this out the way
(RB header, Straight pipe, custom single exit exhaust) no split pipe.
My situation is the rear support bracket on my air pump is cracked (over tightened and snapped)
Before I had a S4 and removed the air pump and installed a BOP with a dual pulley on the alt, so in theory I went ahead and purchased the same items and decided to go with it.
Now after searching I found that if I do remove the Air pump the 5th and 6th ports won't function properly because of the VDi is electronic and is operated by the Air Pump and not by exhaust back pressure like on a NA S4.
I am starting to get upset because my car is down and snapped a few belts because of the air pump being off a bit and I don't want it to continue to slip on the water pump.

So my questions are can I just run my dual alt pulley and leave the air pump on without a belt?
Say F it and take the power loss until I figure something out?
Or Should I wire open my 5th and 6th aux ports?!
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Old Apr 15, 2012 | 09:11 AM
  #2  
Bryan Jacobs's Avatar
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From: where the wild things roam
You can wire open your 5/6th ports until you locate an air pump which is easy theres plenty f/s here and on ebay.
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Old Apr 15, 2012 | 09:29 AM
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Is there a write up anywhere on how to do this?!
Not too tech savvy when it comes to wiring...
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Old Apr 15, 2012 | 09:46 AM
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From: And the horse he rode in on...
Originally Posted by ER34
Is there a write up anywhere on how to do this?!
Not too tech savvy when it comes to wiring...
When they say 'wire open' they are not referring to electrical wiring. They are talking using a piece of baling wire or safety wire to physically hold the ports actuators open.

And by the way, you won't like the performance.

You should buy a replacement and fix the air pump.

And you should also buy a torque wrench so you won't break stuff.

Good Luck!

Jack
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Old Apr 15, 2012 | 11:21 AM
  #5  
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From: https://www2.mazda.com/en/100th/
Originally Posted by ER34
Say F it and take the power loss until I figure something out?
Or Should I wire open my 5th and 6th aux ports?!
try it with the ports closed and try it with the ports wired open, and then just fix it properly
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