safc II help

[skate enjoi]

hey can anyone tell me what each wire is or how to install the safc in a 95 eclipse..... i tried to follow the vfaq thing but it only said what to do with like 5 or 6 of the wires and there were like 6 that didnt even get used.... any help would be appreciated thanks

 

[Cirus_93TSI]

there will always be un-used wires when installing an safc, our cars use the wires that the FAQ told you to use. just tape the other ones off, they are for installing it in other cars.

 

[DSMTalonAWD51]

you should use all of them except 3.

White and yellow are not needed, and I think also blue? Unless you want the blue wire mod for measuring 02 voltage.

 

[spyderturbo007]

The "blue wire mod" is not recommended, as it is known to degrade the O2 voltage signal before it reaches the ECU. This results in a "false lean" value as interpreted by the ECU.

 

[DSMTalonAWD51]

The "blue wire mod" is not recommended, as it is known to degrade the O2 voltage signal before it reaches the ECU. This results in a "false lean" value as interpreted by the ECU.

I see this being said by everyone on this forum, and im sure 99% of these people are saying this just because they read it in the tech section. The fact is the o2 voltage read by the safc is an actual voltage, and the voltage drop you are referring to is insignificant compared to the innaccuracy of even using a narrowband o2 sensor to tune with in the first place.
That being said, the o2 voltage read by a logger is actually nothing more than a calculation made by the ecu, it is not a real voltage, and by no means more accurate than using an safc to read o2 voltage.

 

[skate enjoi]

alrite i got everything hooked up alrite, but the a/f says 100%..... how do i tune my car to what it needs to be..

 

[spyderturbo007]

I see this being said by everyone on this forum, and im sure 99% of these people are saying this just because they read it in the tech section. The fact is the o2 voltage read by the safc is an actual voltage, and the voltage drop you are referring to is insignificant compared to the innaccuracy of even using a narrowband o2 sensor to tune with in the first place.
That being said, the o2 voltage read by a logger is actually nothing more than a calculation made by the ecu, it is not a real voltage, and by no means more accurate than using an safc to read o2 voltage.

The accessory inputs for the SAFC are not designed for low power inputs such as the O2 sensor. Therefore the SAFC "loads" the signal before it is sent to the ECU. This will change the FT's at idle and show a lower than normal voltage at WOT runs.

It is recommended that if you are going to perform the "blue wire mod" that you install a circuit that isolates the O2 signal from the loading effects of the SAFC.

This can be accomplished by installing an operational amplifier circuit, called a voltage follower. This allows the O2 sensor to be attached to the SAFC but still remain isolated.

 

[skate enjoi]

how do i go about tuning it? what menu do i use and how do i know what i need everything at.... right now my a/f is at 100% and my a/f gauge shows 100% also...

 

[spyderturbo007]

how do i go about tuning it? what menu do i use and how do i know what i need everything at.... right now my a/f is at 100% and my a/f gauge shows 100% also...

I don't see any information in your vehicle profile so I have no idea what your mods are, but are you saying that you are trying to tune for larger injectors with a flashy light gauge. Wow, not a good idea.

You really need to pick up a logger!

www.pocketlogger.com

Oh, and what exactly does an A/F ratio of 100% correspond to?

 

[skate enjoi]

evoIII 16G, full 3inch exhaust, 2.5 inch tubular o2 housing with dump tube, front mount intercooler, upper and lower hard IC piping, greddy type S BOV, intake with filter, walbro 255 rewired, safc2, other stuff that i dont think would matter with tuning it.....

 

[spyderturbo007]

You really should have an AFPR with that 255 pump. You are overrunning the stock FPR with a 255.

Anyway, you really need to invest the $150 on a logger. Just pick up a cheap palm from ebay....I got my m105 for $16. Then spend the $125 on the pocketlogger setup.