1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

13B Air Adjust Screw and Variable resistor

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Old Aug 19, 2001 | 07:49 AM
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13B Air Adjust Screw and Variable resistor

Does anyone know which way to turn the Air Adjust screw to put more air in the system? Would the higher in it’s seat allow more air in the system? Or would you crank it down?

Then on the Variable resistor, which direction is rich and which would be lean? The GSL-SE Idle article states there is a black fitting with R—L printed on it, either I’m looking at the wrong part , or the sticker is gone.

Trying to get the POS racer to pass emissions, figure I have miss adjust the above! In advance I appreciate your help!

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Old Aug 19, 2001 | 07:54 AM
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Here's the Variable resistor (I think), let me know if I'm wrong.
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Old Aug 19, 2001 | 07:56 AM
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Here's the Air Adjust Screw (I think), let me know if I'm wrong.
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Old Aug 19, 2001 | 08:50 PM
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air adjust screw

POS! Hello Anyways, you need to unscrew (counterclockwise) the air adjust screw to allow more air in, which should also increase your idle speed. Also, turning the variable resistor to the right is rich and to the left is lean. Get it? Right = Rich, Left = Lean. Some smart folks at Mazda. Well, hope that helps. Good luck.

gump
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Old Aug 19, 2001 | 08:54 PM
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Thanks Gump! I greatly appreciate your help! One I get the POS Racer to hold antifreeze, I'll make the adjustments and see how we do!
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Old Aug 19, 2001 | 09:08 PM
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Hey P.O.S your car seems to be falling apart. If you need to get together sometime just email me, and we can get it all straitend out. I dont live too far away (Arlington).
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Old Aug 20, 2001 | 09:28 AM
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The POS Racer was defiantly living up to her name this weekend!

Pittdp, I greatly appreciate your offer! Luckily this time it was just a hose, which I still need to replace.

Once I get her back in running form, may need your help to get her through inspection, I just know she can pass, figure it’s just a matter of getting her adjusted in correctly for the emissions test!
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Old Aug 21, 2001 | 09:31 AM
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Do you guys think that adjusting both settings for more air, and less gas would help in getting it through inspection based on my test results?

Thanks Again,

Test Results
8/18/01

HC PPM : 2050
CO % : 3.32%
O2 % : 3.0%
CO2 % : 10.9%

1st attempt 5/24/01

HC PPM : 788
CO % : 1.59%
O2 % : 16.2%
CO2 % : 9.8%

Texas HC PPM Max is 220PPM & CO2 % is 1.20% Max.


Last edited by P.O.S. Racing; Aug 21, 2001 at 09:35 AM.
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