wiring an S-AFC in the truck

[king_johnthegreat]

I am wondering how difficult it will be to wire my S-AFC up into my Frontier. Did many of you wire your fuel computers yourself, and if so, about how long did it take? I know electrical systems pretty well, but don't know how closely the truck's KA24DE matches the wiring on a 240SX KA. If it was a biatch for any of you, it may just throw me for a loop. I do not know of any local installers here in Tampa, FL. If any of you guys found it easy enough, let me know. I would also love to know what to look out for, as generically as can be expected. Any help is help enough for me.John

[encasemyheart]

Basically it is tapping some wires and cutting/tapping one wire. Very easy.

I suppose the hard part would be finding out what wires to attach to what, but that info might be in the AFC manual (it is, I don't know about for your truck though) so you may have to look in your truck's FSM and find out which wires are for throttle/speed/airflow/etc. on the truck.

Easy procedure overall though.

[JJ240]

When I installed a VAFC into my friends civic it came with a diagram of what wires from the vafc to attatch to each wire into the harness, then it had another diagram with a picture of the back of the harness where it plugs into the ECU with each cable you needed to splice into labeled. It was actually pretty easy once I realized the diagram was of the harness side of the plugs and not the ECU side

[EZcheese15]

I am wondering how difficult it will be to wire my S-AFC up into my Frontier. Did many of you wire your fuel computers yourself, and if so, about how long did it take? I know electrical systems pretty well, but don't know how closely the truck's KA24DE matches the wiring on a 240SX KA. If it was a biatch for any of you, it may just throw me for a loop. I do not know of any local installers here in Tampa, FL. If any of you guys found it easy enough, let me know. I would also love to know what to look out for, as generically as can be expected. Any help is help enough for me.John

The critical wires for tapping into for the SAFC (A/F, power, ground, etc), should be identical to the 240SX. I just checked the wiring diagram, and it looks like it should match the U.S. N-1 diagram with HW-5 selected for the air metering system.

[Matthew]

Apexi AFCs work on a simple principle, and thats manipulating the signal (voltage) from either the MAP or MAF sensor, which tricks the ECU to think that there is either less or more fuel.Armed with a wiring diagram for your frontier and prinout of what each wire of s-afc needs to be connected too, it shouldnt be hard to install it.Infact, there is a local shop running an s-afc on their dodge viper.

[king_johnthegreat]

That is what I was uncertain of, the signal type. I know it is an HW, just didn't know if it would be -5, or -6 for the sensor number. I found the power, ground, throttle, MAF, and RPM signal wires (Finally); still a bit unsure as to what numbers to plug into it for initial tuning, though. What position does the throttle type arrow point in: up, down, what? I have the impression that the sensor reads 5V at idle, and less at higher throttle, is this correct of the 240SX?John

[king_johnthegreat]

Well, it is in, and seems to be working. I did the majority of the setup stuff without conflict, but did not ever see a screen in which to enter the sensor number. I saw in the manual under sensor type and number that the 240SX is an HW-5. Many of the Sylvias are HW-6's. I never found a place to enter the numerical portion of that statement, though, just the hotwire part!! Whatdadiilyyo??? I did get as far as sensor in: 1 and Sensor out: 1, hotwire, throttle up, 4cyl., and set the user defined RPM points, a few other various things, just not that stupid number I mentioned before!! Thank you all so much for your help, though, it has made a huge difference to gain confidence from other members. I do believe that I am the FIRST Frontier with an S-AFC!!John