ok i have asked before. my evo 03 gsr, 3" turbo back from megan racing with a perrin cat delete. perrin turbo intake tube w/ sponge filter, manual boost controller and a super afc2. my prob is that we tuned the car and used the afc to lean it out a lil. well it still runs like crap. it will idle fine run like bat out of hell, but every now and then the idle will go stupid, spiting and spuddering, then it will clear up. oh and once i had the boost controller installed it kept blowing the intercooler piping apart, so i took the boost away and it still runs bad. has any one else come across this?

 

SAFC cannot help your idle. You need a flash to help especially with an intake. SAFC is only good for open loop settings (wide open throttle or near WOT).

 

HKS EIDS http://www.hksusa.com/products/?id=2175

 

I have the same problem... Its your intake. Someone is selling the EIDS in private sale for 60 dollars shipped.

 

I'm switching from the SAFCII to the HKS SAFR w/built in EIDS.

 

but im not using a vent to atmosphere valve, im using a turbox recirculation valve.

 

Double check your wiring;
http://www.evotuners.net/forums/showthread.php?t=111

and your settings;
Karman sensor
arrow up
4 cylinder

Check your vacuum hoses for leaks and proper connections. You say you "leaned it out a lil." Highs and lows? Do you have access to a logger to monitor fuel trims?

 

That is true of the really old school AFC, but not true for the SAFC and SAFC 2. They have hi and low throttle adjustment tables. To play with things that effect daily drivability and idle you need to adjust the low throttle settings table.

Keith

 

It still does not apply as the ECU learns quickly and will "tune out" the AFC settings in closed loop even in Lo. SAFC only works in open loop. The Lo setting is meaningless on our cars.

 

Actually you are mistaken as an Safc will in fact help out your idle mixture. The ECU will not tune anything out if in fact the fuel trims are within spec. If you play enough with the SAFC to the point were you're running it way to rich at idle the ECU will in fact try and correct it by lowering the fuel trims. If set properly however nothing will trigger the ECU into changing the parameters.

 

the part about the wiring. we (my techs and i) have been on the phone bac kand forth with cali with the tech line for apexi and they gave us a diff diagrame, different than what's in the book and what you just gave in that link.

 

I have the same problem and have played with the AFC II a lot with no solutions. It is basically your intake messing up the MAF readings. My idle is only affected when riding the clutch and then pushing it in right away like stop and go traffic or going throug a drivethrough. I've searched this a lot and the only way I've heard to fix is is with the HKS EIDS, which makes your car idle really high in winter, or with a proper flash. I'm going with the flash this spring and hopefully that will help. Good luck!

 

LOL, hey man, the ECU will put the car at 14.7 at idle or anything else closed loop. It doesn't matter what you set the AFC at, the ECU will move it back to 14.7 AF. WTH are you talking about? Maybe this will help:

https://www.evolutionm.net/forums/sh...d.php?t=116519

Besides, it's not AF that you need to adjust at idle to smooth it out. You need to remove some timing at idle. Please tell us how to adjust the timing with the AFC at idle as well, LOL!

 

Orange is in from the sensor.
Pink is out to the ECU.
Trust me on this one. Your going to love me.
With our Karman sensor, we don't use the blue, yellow, and white wires.


Your going to love me.

 

With bigger than injectors, you need to tune out fuel to get the fuel trims in line. It has nothing to do with timing at idle.
sabastian458 this should help you too;
http://www.evotuners.net/forums/showthread.php?t=315