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

AFL on SAFCII prob

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Old Jun 15, 2005 | 03:58 PM
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Turbo Mazda MX-3 Owner
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From: East Wenatchee, WA
AFL on SAFCII prob

Ok cause no one else seems to know on any other mazda board,

I turbo charged my Protege engine and am useing the 2nd gen S4 B code VAF for my Airflow meter. The issues aren't with that matchup cause that is what most protege owners do and it works for them.

My problem is that while driving the AFL or Airflow shoots up to 100% while either under no boost or very little boost. I am running stock boost for a Subi RS Liberty turbo which is around .3-.4 BAR or 4 to 6 PSI. I switch between VAF's and so far it is not the vaf. I have made sure that the VAF is level, checked the grounds and wiring but it still does it. It seems to be making the car go super rich which in turn is making a lot of black depostis from the carbon on my spark plugs. It isn't spark, fuel, or any other issue I can tell. It is something to do with either the SAFC II, VAF, or ECU. I have another ECU I might try.

But pretty much asking, Anyone ever notice anything like this on a Turbo'd car with a SAFC??

Thanks.
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