I know it's been highly debated on wether or not the the APEXi S-AFC works or not, but I promise you it does. I have had it in my car now for about 6 months and I kind of thought it might it was not working. At the time, I didn't know how to really use one so the shop that put it in had roughly tuned it. I was occassionally running rich like I was supposed to, but it was very speratic. A couple of days ago I was on the interstate and I really paid attention to all my gauges(EGT,A/F, and the S-AFC) I noticed what my fuel was doing in relation to throttle postion and eventually figured out what it was doing. I tuned it further and now and only now am I running rich all the times I supposed too. It really works well. THe people who installed them before must have definitely done it wrong, no pun intended. If you have ever considered one, definitely get it. Any questions, just ask
TUrbo PR5's, S-AFC
- Thread starter mikem
- Start date
Little Beavis
Member
- :
- 2001 MP3-T (#911)
Hey, did anyone ask for more details? 
How about who installed it. . .we need more info. . .
How about who installed it. . .we need more info. . .
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Yeah, the people who installed the S-AFC knew how and what they were doing.
It does not work with the MAF signal. End of story.
The shop that installed your S-AFC must have done something to help it. What did they do?
And how are you tuning it if you have no idea what you are doing?
And, I'm going to call foul, the car runs rich in open loop as it is, you would want to lean it out up top in an N/A application....
It does not work with the MAF signal. End of story.
The shop that installed your S-AFC must have done something to help it. What did they do?
And how are you tuning it if you have no idea what you are doing?
And, I'm going to call foul, the car runs rich in open loop as it is, you would want to lean it out up top in an N/A application....
I'm not a n/a car, I have a t3 turbo on it and a WHOLE lot of other stuff. As far as me tuning it, it didn't take long to figure it out once you got the jist of it. Honestly I'm not sure if they(the shop) put a resistor in or not. They have tons of experience with aftermarket forced induction installation. As far as the wiring diagram, I work at a mazda dealer, I just went to the back where service is, got a copy of the electricla schematics with ecu pinpoints. To the best of my knowledge, mine was just hooked up to the CORRECT ecu pin points. I'll tell you this much, I've got to buy 4 new plugs, because i've fouled them with to much fuel, yes to much fuel. N/A guys for the guy who responded yes infact want to run stoichmetric, not rich like the ones of us who are boosted. I don't have access to a dig camera, but there was a thread I was a part of originally started by a guy by the name agent(i think).
Good Luck and Happy Boosting
Good Luck and Happy Boosting
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mikem said:
Everyone else who hooked up the S-AFC hooked it up to the CORRECT pins as well...
That's the problem.
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That's what I'm saying...
Can you talk to the shop that did the install and see what they say? Ask them how they installed it, maybe provide the pin-out so as to show us?
Just some thoughts, because, like I say. As of since whenever it doesn't work.
Can you talk to the shop that did the install and see what they say? Ask them how they installed it, maybe provide the pin-out so as to show us?
Just some thoughts, because, like I say. As of since whenever it doesn't work.
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mikem said:
The MAF is not hooked up you say?
how is your a/f gauge set-up?
are you still on stock injectors?
I'm just wondering 'cause I know how much trouble deckedoutmp5 has had. I can't remember if he's got the S-AFC but unless you've got a readout from a wideband or you're actually reading from a wideband on your a/f gauge then I would want to check the true afr... Not trying to be pessimist just don't want another blown-to-hell Protege.
Glad to hear things are working out for you
are you still on stock injectors?
I'm just wondering 'cause I know how much trouble deckedoutmp5 has had. I can't remember if he's got the S-AFC but unless you've got a readout from a wideband or you're actually reading from a wideband on your a/f gauge then I would want to check the true afr... Not trying to be pessimist just don't want another blown-to-hell Protege.
Glad to hear things are working out for you
My A/F is hooked up to the primary o2 sensor. Yes stock injectors for the time being. When my a/f gauge was reading rich after adjusting the s-afc, my egt temps were about 200-300 degrees cooler than before.
Stuter, The only reason I say that is I do not get a reading on the s-afc for air flow of over .02. That tends to make me think that it's not hooked up, or at least not properly for that aspect of the s-afc. I have been wrong before, But I'm telling you, It works.
Stuter, The only reason I say that is I do not get a reading on the s-afc for air flow of over .02. That tends to make me think that it's not hooked up, or at least not properly for that aspect of the s-afc. I have been wrong before, But I'm telling you, It works.
If you wired it in as the manual states it will not function for airflow adjustment. If you did not add any type of resistor, it will not work. My guess is you have an FMU on the car and it responds differently to weather changes as any normal POS Mazda ecu will. That or you've got another means of modifying the sensor signals, like a voltage clamp or whatnot.
If you didn't hook it up, you shouldn't be stating things like this... We already had another guy claiming other things about another system that weren't so true as well.
Pull your dash apart and trace the wires.
If you didn't hook it up, you shouldn't be stating things like this... We already had another guy claiming other things about another system that weren't so true as well.
Pull your dash apart and trace the wires.
turboge,
The shops phone number is listed for reference to my claims. Maybe adjusting the fuel correction on the s-afc and the a/f gauge cooberating the change along with the egt temps lower than usual was just a big stroke of luck. That stated luck has transpired now for a few days. My egt temps before adjusting the s-afc were quite abormal(HOT). Since the temps fell dramatically after adjusting I assumed it was working. I'll be the first to admit I don't know everything, and I had doubts myself since for almost 6 months my temps were kind of hot(that was with the rough tuning of the shop) not to mention the weather change increased the heat of the egt. I would simply state giving the aforementioned information that it works. If that does not give me the authority because I did not hook it up myself, I apologize. And yes I do have a POS FMU. BTW my POS ECU doesn't even register with an OBD-2 computer. So yes my s**** got issues, but the fact that this damn thing works is not one of them.
The shops phone number is listed for reference to my claims. Maybe adjusting the fuel correction on the s-afc and the a/f gauge cooberating the change along with the egt temps lower than usual was just a big stroke of luck. That stated luck has transpired now for a few days. My egt temps before adjusting the s-afc were quite abormal(HOT). Since the temps fell dramatically after adjusting I assumed it was working. I'll be the first to admit I don't know everything, and I had doubts myself since for almost 6 months my temps were kind of hot(that was with the rough tuning of the shop) not to mention the weather change increased the heat of the egt. I would simply state giving the aforementioned information that it works. If that does not give me the authority because I did not hook it up myself, I apologize. And yes I do have a POS FMU. BTW my POS ECU doesn't even register with an OBD-2 computer. So yes my s**** got issues, but the fact that this damn thing works is not one of them.
