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

Smog Pump losses?

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Old Jan 25, 2019 | 09:59 AM
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WobblyBobbly's Avatar
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Smog Pump losses?

My FC still has the smog pump. This would seem to be kinda unnecessary, and I live in an area that doesn't require emissions testing.

What would it take to remove it? Other than reducing complexity (which is always good in my book ) what kind of gains in HP / TQ / MPG could I expect?

On the other hand, if there's a bunch of fiddly stuff that would get screwed up by removing it, I'd leave it under the heading of "if it ain't broke, don't fix it."
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Old Jan 25, 2019 | 10:02 AM
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From: https://www2.mazda.com/en/100th/
its in the isn't broke don't fix it category.

gains in hp/tq is zero, and if anything mileage goes down
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Old Jan 25, 2019 | 10:08 AM
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What year is the vehicle? The 89-91 cars rely on the air pump for aux port actuation.
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Old Jan 25, 2019 | 04:09 PM
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Originally Posted by Relisys190
What year is the vehicle? The 89-91 cars rely on the air pump for aux port actuation.
Mine is a 1991 Convertible. Didn't know about the aux port actuation...and we kinda need that! Seems like a lot of hardware just to run one little actuator though...
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Old Jan 25, 2019 | 05:01 PM
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It operates the 5th and 6th ports located in the side irons and it also supplies the air for the VDI intake system. There’s a write up somewhere where electronic actuators were used to operate used in conjunction with an rpm sensor? Interesting stuff.

-M
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