FIC Installation Notes: Nissan / Infiniti

[MP]

1989-2003 Nissan Skyline GTR (RB26DETT engine)

FIC Part number:   30-1910
Cam Sensor: Hall Effect (3-wire)
Crank Sensor: Hall Effect (3-wire)
Engine Load: Dual MAF Sensors
ECU Location: Cabin

FIC MAF Table notes: Version 2.01 and newer FIC software should allow clamping of the stock MAF signals. This has not yet been tested, but the version 2.01 and newer software has 3 remappable sensor channels: MAF (in & out), Analog A (in & out), and Analog B (in & out). Since we have not had the opportunity to test this, the wiring diagram does not show the MAF sensors being intercepted by the FIC.


Wiring diagram is attached.

[JN]

2005-2006 Nissan 350Z
2005-2006 Infiniti G35

FIC Part number:   30-1910
FIC Slave Firmware: z107.hex
Cam Sensor: Hall Effect (3-wire)
Crank Sensor: Hall Effect (3-wire)
Engine Load: MAF Sensor
ECU Location: Cabin

 The 05-06 350Z/G35 requires different code for the F/IC.  The code is z107 and can be downloaded from this post, along with the wiring diagram and instructions on flashing the F/IC.


FIC O2 Table notes:
For the 350Z and G35, FIC software version 2.01 or newer must be used.

Boosted 350Z/G35 owners who want to enrichen the fueling at partial throttle settings when the factory ECU is in feedback mode can do so with the F/IC. The Factory ECU tries to run the engine at stoich (~14.7:1 Air/Fuel) when it is not at full throttle. However, forced induction 350Z/G35's can make boost while still at partial throttle and the ECU is still in feedback mode. 14.7 is TOO LEAN to be running when under any appreciable boost and can cause stumbles.

The 05-06 350Z/G35 has UEGO style O2 sensors, but the F/IC can still modify your target AFR's. It is assumed that you have the F/IC hooked up per the recommended connection diagram from AEM. It is also assumed that you have an independent AFR device to confirm the proper operation. It doesnt have to stay on the car but it is valuable during setup to confirm proper operation.

Step 1:
Open the Setup dialog box
In the O2 sensor section (top right)
Load Input = MAP (Sets the Y axis of the O2 map to the internal MAP sensor)
Mode = Voltage (says the table will contain raw voltages)
Period = Not applicable for Voltage mode
Bank1 Hi voltage = 4.95
Bank1 Lo voltage = 0.0
Hi Level Drive = Checked

Now open the O2 Map by either clicking on the icon with the big "O" in it or select "O2 Map" under the maps menu.

The O2 Map is a 21 RPM (X Axis) by 17 Boost (Y Axis) table. In each cell is the voltage you want for each operating point (The F/IC interpolates between the 4 nearest breakpoints for smooth transitions).

Set up the load axis by clicking on each breakpoint and setting it to whatever you want. You can also drag a bunch of them and it will interpolate between the end points. Do the same with the RPM. These two sets of breakpoints are unique to this table so changing them wont change them in other tables.

Enter the desired closed loop AFR target into the cells of the table using the following values.

AFR   Value
15   3
14.5   2.5
13.9   2
13.1   1.5
12.3   1
11.7   0.5
11.4   0.25
11.2   0.1



So if you want 13:1 AFR in a particular point, put 1.5 in that point in the table. Some minor tweaking may be required but these values will get you VERY close. As long as the factory ECU is in feedback then these values will be used.

IMPORTANT:
If you just change the target AFR, the factory ECU will adjust the trims to achieve the desired AFR. BUT, if you make huge changes then you will get huge trim corrections and the chance of a check engine code for excessive trims. Dont forget to adjust the fuel maps to add the approximate amount you are requesting here. That way the trims will stay near zero!

Wiring diagram and firmware flashing instructions are attached.

[SB]

Wanted to put this near the top, as it has been rearranged and updated.

[mtbbiker]

I have an '07 G35 and I notice your application list only '05 and '06. Will this kit work on a '07?

Thanks in advance!

[hwngtr]

Got a 2005 up-rev 6spd G35 N/A, bought the unit, bought the plug in harness, what was told to me was if I plug it in and upload the correct file for my car along with leaving everything zeroed out the car should run as if it was not there. I did just that, the car LEANs up from 13 to 15 and has several spikes in the rpms driving normal and even worse under a load. 6 hours of tuning did not fix this problem ( and we all know time on the dyno is money), Thanks to the tuner, he helped me narrow down the problem without killing me with hourly rates. I chose AEM FIC because it gave me exactly what i needed to finalize the car by allowing me to slightly lean the top end out with out having to go and purshase a full on EMS system for 1 minor thing. NEED HELP car SPIKES rich at 2500 4000 and 5200 rpm with FIC and runs fine with out. I need the FIC because factory settings run way to rich on top end.

[SB]

If you enter all zeros in the FIC's O2 table when it is configured in Voltage mode, that will output 0 volts, which will change the O2 signal that the ECU measures. This could definitely make the car run poorly. Try putting the O2 table in Percent mode and setting the entire table to zero, that should prevent the FIC from making changes to the O2 sensor voltage.

If the FIC's O2 table is causing the car to run poorly, you should be able to diagnose that pretty quickly by using an OBD scanner. Did the shop use an OBD scanner to measure short- and long-term fuel trims? Any shop that tunes piggybacks (FIC or otherwise) should have one.

Hope this helps,
SB

[Jackasknissan]

 you should add 240sx to the list, I'm 1990 sohc and Ive been successfully using this for almost 6 months now

[luis007]

need some help to conect the fic to a 03 n/a 350z
thanks

[luis007]

hi can i use this same diagram on a 03 350z

thanks

[hwngtr]

If you enter all zeros in the FIC's O2 table when it is configured in Voltage mode, that will output 0 volts, which will change the O2 signal that the ECU measures. This could definitely make the car run poorly. Try putting the O2 table in Percent mode and setting the entire table to zero, that should prevent the FIC from making changes to the O2 sensor voltage.

If the FIC's O2 table is causing the car to run poorly, you should be able to diagnose that pretty quickly by using an OBD scanner. Did the shop use an OBD scanner to measure short- and long-term fuel trims? Any shop that tunes piggybacks (FIC or otherwise) should have one.

Hope this helps,
SB

Took advice and tried. removing from voltage to percentage right away changed the way the idle was. it became smoother but a little on the rich side. set it to -1.8 and clear that up, i used the calculator to fill in the rest section by section. car is deffinatly running a little smooth all around but still have the same problem with spikes driving normally. mostly noticable in third gear and on the freeway fifth and even sixth gear. the car sputters for a second or two. when under a load it is more noticable but with the speed pick up not as long. STILL NEED ADVICE.

[hwngtr]

i went to AEM and spoke with electronic, they got a hold of my tuner and did there tech talk. we swapped out z107 with z110 and there is a night and day difference, i haven't had missfire or spike yet, no codes flashing and idle sits still. seem to have worked, will definetly put some more hours on it to make sure. Thanks for youyr help.

[SB]

Glad to hear everything worked out, hwngtr.

[marra23]

i went to AEM and spoke with electronic, they got a hold of my tuner and did there tech talk. we swapped out z107 with z110 and there is a night and day difference, i haven't had missfire or spike yet, no codes flashing and idle sits still. seem to have worked, will definetly put some more hours on it to make sure. Thanks for youyr help.

hi , new here. i have a 350z 2004 (not rev up) and votech s/c with 600cc injectors. any advice on were to begin and what maps to run.   

[awd4life]

new to the forums here! looking into wiring an F/IC into my KA24DE 240 for future turbo purposes.

i'm wondering who all has had success with this product on the oldish nissan ECU's. i'm hoping to perform the MAF clamp proccess while running N/A and hopefully use it in the future with the turbo setup.


one general question that i've pondered though, pertaining to the MAF clamp and related MAF reading info for the computer. does anyone know if the external/pre MAF IAT sensor on these KA setups suffice for an accurate inlet temp sensor when converting/faking a MAP signal? i know the typical MAF has an inlet temp sensor inherent in it's design but would the external temp sensor be acurate enough to use?

in for idea, hoping to use this product on toyota MR2's 1st and 2nd gen...

thanks

[Peacekz]

Hello there
I'm new here. Really like AEM products and finaly got a car wich is tune resanoble.

I'm planing to increase boost and need to correct fuel/ignition. I think AEM FIC is the best piggy back, at least for my needs so i'm looking for pnp wires or wiring diagram for my Skyline ECR33 1993 with RB25DET. Any ideas?