s afc ii

[jus10 msp]

does anyone have info if the apex-i s-afcII will work. if you put a 1k ohm resistor in line with the mass air flow senor. it would lock the voltage in. the only issue is the damn close an open loop. i think we mite have something it we can lock the voltage. i been doing alot of reading and i will call apex-i on monday. need more info and help.


thanks justin h

 

[Captain KRM P5]

All of the turbo gurus and tuners who have tried have stated time and again that the S-AFC will NOT work on the protg. I think there is one or two people still trying to get it to work, but the general consensus seems to be no. The ecu rejects any and all inputs in favor of its own written maps while in open loop. This problem was apparently recently discovered with the GReddy emanage as well.

 

[Dexter]

its not only that, but the stock ECU learns that its being fooled and then readjusts itself, therefore ******* you over.

 

[jred321]

how could it possibly reject any and all inputs? if it did, how would it know where to be on its map? it isn't based just on engine speed.
most cars simply reject the o2 readings, which it usually uses to constantly adjust the a/f, in favor of its own maps.
i can see the learning thing though, other cars have that problem so they can't use piggy backs.

did perf ever write an update on his attempt?

 

[BinaryRotary]

I'm working on the HKS Super AFR right now.

 

[Dexter]

how could it possibly reject any and all inputs? if

it doesnt...it still has to read from TPS or MAF or something.

 

[jred321]

it doesnt...it still has to read from TPS or MAF or something.

exactly my point, it still takes in some inputs (i would guess maf as a minimum). it doesn't reject any and all. the main thing it rejects is the o2 sensor reading

 

[Dexter]

im agreeing with you jred
what captain said was incorrect

 

[jred321]

i know

 

[Captain KRM P5]

i know

okay...what i had read in more than a few places is that while the car is in open loop, it doesn't take readings in from anything - it goes solely off of the fuel maps that are written into the ECU itself.

 

[jred321]

it does go off of the fuel maps, but picture those maps as a grid. it needs to know where to be within those maps, so as a minimum it needs an x and a y coordinate. say the x is engine speed, you need at least a y to know where to go within that map to get the injector pulse duration. granted it is more complicated than this, but that gives a basic idea.
say you were at a different elevation or temperature, it needs to be able to adjust for this so it can't just run off of engine speed.

i've read it places on here too, but it doesn't make any sense and is, well, wrong

 

[speedfrk]

Ford pcm they all have this issue. one of our best options which I will be looking farther into later will be the superchipcustoms flasher unit which turns the stock computer into a standalone setup.

 

[Manach]

it does go off of the fuel maps, but picture those maps as a grid. it needs to know where to be within those maps, so as a minimum it needs an x and a y coordinate. say the x is engine speed, you need at least a y to know where to go within that map to get the injector pulse duration. granted it is more complicated than this, but that gives a basic idea.
say you were at a different elevation or temperature, it needs to be able to adjust for this so it can't just run off of engine speed.

i've read it places on here too, but it doesn't make any sense and is, well, wrong

That's a 2d configuration of an ECU, or PCM.

OBD-II ECU are using from time to time a 3d fuel map. Maybe our PCM is a 3D, which now, we are at three variables. x, y, and z.. As I see it, the S-AFC use only the X, and the Y.. The Z might be the one telling the PCM that the 2 firsts variables are wrong.

To go in Open Loop, was are the condition for that condition? Well, for the MSP.

 

[505zoom]

Ford pcm they all have this issue. one of our best options which I will be looking farther into later will be the superchipcustoms flasher unit which turns the stock computer into a standalone setup.

I am wondering about this as well. If the stock computer wont allow you to manipulate it with an AFC or e-manage, then why can't we just get someone other than mazda, or some device to tune the stock computer itself???

 

[jersey_emt]

I am wondering about this as well. If the stock computer wont allow you to manipulate it with an AFC or e-manage, then why can't we just get someone other than mazda, or some device to tune the stock computer itself???

Nobody's been able to crack the Protege ECU (as far as I know)

 

[505zoom]

Nobody's been able to crack the Protege ECU (as far as I know)

Oh, is that all? I'll go get right to it then.

 

[4001]

Perfworks and Wagner got it to work on my MSP

 

[Manach]

Perfworks and Wagner got it to work on my MSP

The S-AFC ?

 

[4001]

S-AFC II

 

[hukster00]

what did they do to get it working use resistors ?