Air/ Fuel Ratio gauge

[SamE30e]

Installed the narrowband, it gave me a idea of the problem. on WOT it was running rich for some reason, I think the AFM was out of wack, so I adjusted it to lean it out a bit and now it runs better...

Useless my ass, thats all I wanted to know, rich or lean, or if it wasn't a problem with fuel mixture.

[NC325iC]

ok so youre saying that you adjusted your afm throughout its operation because your car was running rich at WOT where the computer no longer takes any reading from the o2 sensor... oh well that makes sense to me

[SamE30e]

ok so youre saying that you adjusted your afm throughout its operation because your car was running rich at WOT where the computer no longer takes any reading from the o2 sensor... oh well that makes sense to me

Sorry, my bad, after observing the gauge throughout various throttle positions while under load.

[nando]

Installed the narrowband, it gave me a idea of the problem. on WOT it was running rich for some reason, I think the AFM was out of wack, so I adjusted it to lean it out a bit and now it runs better...

Useless my ass, thats all I wanted to know, rich or lean, or if it wasn't a problem with fuel mixture.

you are a retard. it's supposed to be rich at WOT, and the AFM has nothing to do with WOT either - it runs in open loop, ignoring the AFM signal completely.

also, all you are seeing with the gauge is it's richer than 14.7 in some areas. how much richer though? 14.5? 10? 13.7? you have no idea.

[SamE30e]

you are a retard. it's supposed to be rich at WOT, and the AFM has nothing to do with WOT either - it runs in open loop, ignoring the AFM signal completely.

also, all you are seeing with the gauge is it's richer than 14.7 in some areas. how much richer though? 14.5? 10? 13.7? you have no idea.

Oh well, my car runs better and doesn't burn a shit load of gas.. So apparently i'm not retarded.

[delatlanta1281]

Ok I have a question then. I replaced my intake man. gaskets six months ago. One folded in the process and the car got worse and worse. It wasn't running too badly, but my a/frm started showing more and more lean.... I knew something was wrong b/c of the meter and low and behold.... It was right.
So what's so useless about that?

So no one want's to explain to me why my experience proves the ss meter isn't useless?

[SamE30e]

So no one want's to explain to me why my experience proves the ss meter isn't useless?

Oh god, don't tell them that the gauge actually works, you'll start up a shit storm! Just because they have read that it doesn't work on the internet and its useless that MUST mean that its right...

But it worked for me so yepp..

[nando]

Oh god, don't tell them that the gauge actually works, you'll start up a shit storm! Just because they have read that it doesn't work on the internet and its useless that MUST mean that its right...

But it worked for me so yepp..

yep, I just read it on the internet. I have no idea what I'm talking about. you can totally "tune" your car with a narrowband sensor and turning the wheel on the AFM - that's how all the pros do it anyway. :roll:

[backtrail69]

How about you girls man up and install and tune a standalone oh a hot street/race motor like Nando and I have... You would learn a lot about tuning. You first off would throw moronic in the garbage. It is fine on a 100% stock car, but its a pile of shit beyond that. NO ONE tunes ANYTHING with a narrow band that has ANY idea what they are doing.

[DaveSmed]

yep, I just read it on the internet. I have no idea what I'm talking about. you can totally "tune" your car with a narrowband sensor and turning the wheel on the AFM - that's how all the pros do it anyway. :roll:

Let it go, and just be glad hes not ghettofing anything nice. He's happy, he "fixed" his car afterall.

[SamE30e]

yep, I just read it on the internet. I have no idea what I'm talking about. you can totally "tune" your car with a narrowband sensor and turning the wheel on the AFM - that's how all the pros do it anyway. :roll:

I'm well aware that you can't tune your car with a narrow band, otherwise I wouldn't have the LC-1 with my MS that i'm putting together. I used it for a ROUGH idea of the problem. And the problem was I have a AFM off a car from the yard and the cap wasn't sealed on it, so obviously someone had tampered with it. So I wanted a rough idea as to what the problem was.

Did it work for me? Yes
Does it make you not sleep at night? I sure as hell hope not, but sure seems like it does.

[delatlanta1281]

yep, I just read it on the internet. I have no idea what I'm talking about. you can totally "tune" your car with a narrowband sensor and turning the wheel on the AFM - that's how all the pros do it anyway. :roll:

I understand that Nando, but in my experience, the ss meter helped bring to light a potential problem.

[DaveSmed]

Does anyone actually understand how the narrowband input into the DME is supposed to work, what kind of signal it is, and how the DME uses it?

[nando]

sure, it's rather simple. it's an oscillating 0-1v signal with .5v being stoich (a wideband is typically a linear 0-5v). the ECU tries to keep the engine running as close to stoich as possible - and a narrowband only outputs rich, stoich, or lean. so if it reads lean or rich, it will adjust the PW until it reaches stoich - but the ECU has no idea how rich or how lean, only that it isn't 14.7:1. and of course above a certain load (about 70%) it switches to open loop mode and goes off the VE table only. it's pretty reliable and works fine for a static tune/stock engine.

[SamE30e]

Which is what I just did..