hey i was wondering. If i adjust my SAFC say richer, my A/F gauge shows that the ECU still compensates and makes it the correct A/f mixture. So i was wondering if it is actually doing something. like when i change the AFC setting is the car actually compensating for the new richer setting. If this is the case, tuning the AFC with a voltmeter would be useless, cause the ECU will always compensate to bring the mixture back to stoich and maintain that proper ratio. I was reading the tuning of the afc section on the main board, and i was like huh, because if i richen my afc the ECU appears to just correct the A/F by itself Negating the reading on my voltmeter. say i richen it 10% it will get rich and show rich on the volt meter for like 5 seconds, but then the ECU compensates and brings the A/f ratio back to stoich and then it begins to fluctuate back and forth with the same upper voltage limit as before. so is tuning with the A/F meter for WOT only, cause then how would you tune fro the LO-throttle settings on the AFC?

Rest In Peace Heidi Doggy

I wrote a real long post about "fuel trim" on a datalogger thread a few days ago. Reading that will reinforce what you've been noticing with your tuning. The AFC is really only good for 2 things. One is adjusting for much larger injectors. If your injectors are so big that the ECU can't compensate for all the extra fuel, you use the AFC to trick the ECU into injecting alot less fuel. This will bring the amount of fuel being injected back down to the level where the ECU can adjust lean/rich as it needs to. The other thing that an AFC can do is lean things out under WOT. Under WOT, the ECU stops listening to the O2 sensor (and adjusting lean/rich in real time) and just injects how much fuel it thinks will work based on intake temp, manifold pressure, etc. The AFC can be used to adjust the manifold pressure sensor output and trick the ECU into injecting less fuel. So if you have a stock fuel system (injectors, FPR) then the low throttle settings are pretty meaningless.


Corbin
'95 ESI-T
HRC + FMIC

Corbin
'97 GSX dressed like a '95 ESi

yeah can u tell me why S-AFCs dont work for 96es? i get error code 12 i think map voltage sensor and cant figure it out. it's hooked up correctly for sure, and neither adel, armond, murix or ray can figure it out. sux ass for me



Kory
fasteclipse@cisco.com
aim sn: dukmahsik
Happy Honda Hunting!

The Original 2GNT []D[][]Y[][]D


96 RS


97 GSX

I've had a CE light ever since I installed mine on my '97...

So who's going to come out with a device to alter O2 voltage signal?

"Character is doing the right thing when no one is looking."
Michael J. Kulaga e-mail: Michael_97RS@2gntDSM.zzn.com
aol IM: MJKulga Website: http://highlander.dsmpower.com/

Injen CAI, 55mm TB, Hooker 4-1 Stepped Header, GS-T Muffler, AFX UDP, S-AFC, 8.5mm Magnecor Wires, SS Clutch Line, NRG Susp. Motor Mount Ins., FU/RU/RL STBs, TSW Blade 17x7.5, Bridgestone Potenza RE730 215/45ZR-17. Front KVR Cross-Drilled Rotors and Carbon Fiber Pads

To Be Installed: Rear disc brake conversion kit, SS Brake Lines, Rear KVR Cross Drilled Rotors and KVR Carbon Fiber Kevlar Pads, EGT (partially installed)

Firefly:
Mal: You don't know me, son, so let me put this to you plainly: If I ever kill you, you'll be awake. You'll be facing me. And you'll be armed.

>I've had a CE light ever
>since I installed mine on
>my '97...
>
>So who's going to come out
>with a device to alter
>O2 voltage signal?
>



I thought your a/f meter was settin off your CEL?

did it come on later?


__________________________
...just my $.02
95 GS

____________________________
My $.02
95 GS

Did it without my A/F Meter plugged in... So I have some things to check now...

"Character is doing the right thing when no one is looking."
Michael J. Kulaga e-mail: Michael_97RS@2gntDSM.zzn.com
aol IM: MJKulga Website: http://highlander.dsmpower.com/

Injen CAI, 55mm TB, Hooker 4-1 Stepped Header, GS-T Muffler, AFX UDP, S-AFC, 8.5mm Magnecor Wires, SS Clutch Line, NRG Susp. Motor Mount Ins., FU/RU/RL STBs, TSW Blade 17x7.5, Bridgestone Potenza RE730 215/45ZR-17. Front KVR Cross-Drilled Rotors and Carbon Fiber Pads

To Be Installed: Rear disc brake conversion kit, SS Brake Lines, Rear KVR Cross Drilled Rotors and KVR Carbon Fiber Kevlar Pads, EGT (partially installed)

Firefly:
Mal: You don't know me, son, so let me put this to you plainly: If I ever kill you, you'll be awake. You'll be facing me. And you'll be armed.