My Miata occasionally goes lean under boost

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Sep 8, 2013 | 02:37 PM

#21

CAF92

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Quote:

Originally Posted by triple88a

Where does the red yellow and green waving gauge take its signal from if you dont have a wideband?

As far as I know, it uses a standard o2 sensor. But I'm not 100% on that as I am new to a car this stuff.

Sep 8, 2013 | 02:50 PM

#22

CAF92

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Quote:

Originally Posted by sixshooter

It's called garbage. It would benefit you more to pipe the exhaust gas into the cabin and try to sniff it to determine if you were rich or lean and by how much. Be sure to do this with all of the windows rolled up or it won't be as accurate.

A wide band is nice, but you can still get a basic idea on what the afr is like. They don't work for the serious tuner, which I obviously am not and I don't need a bunch of AHs to tell me that

Sep 8, 2013 | 04:27 PM

#23

triple88a

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Quote:

Originally Posted by CAF92

As far as I know, it uses a standard o2 sensor.

Exactly.

Quote:

Originally Posted by CAF92

A wide band is nice, but you can still get a basic idea on what the afr is like. They don't work for the serious tuner, which I obviously am not and I don't need a bunch of AHs to tell me that

Do you know the range of the narrow band? Its only between 13 and 15.5... meaning the part you WANT is outside its range... in boost you want to be at 11.5-12 afr... which the narrowband sensor cannot read.

That said you dont need to be a "serious tuner" to have a properly running car especially since the wideband is only a 150 bucks part..