Aem f/ic update

H

h-townxj

NAXJA Forum User
Location
Hanford, Ca
Hey guys update on some of the issues I was having. I would have posted in my old thread but I couldn't find it sinc ethos forum drops off oddly enough.

CEL for o2 sensor voltage high:
Installed my resistors per diagram no more cel

Hooked up both o2 sensors now pulls a little harder going to data log a few pulls tomorrow. Main issue I still can't resolve is my part throttle tune still leans out not as bad but still does. (something bisimoto should be able to resolve for me.)

My professional tune will hopefully be in 2 months after I get my wheels back from beadlock conversion and buy my new tires.
 
I'm still waiting to weld some exhaust leaks before I tune my AEM. I played with the o2 offsets and got part throttle afrs in Neutral(no load) down in the 13s. I also played around with zeroing fuel trims in Neutral as well. All works. My 2nd o2 was bad, which was why I had a CEL for it. On the AEM live data, I could see it was stuck at 3V(dunno how that happened since heater voltage is 12V). Anyhow, I like the software and on-the-fly tuning. I ended up using 1.1K ohm resistors so my target CL afrs have dropped to 14.2-3:1 instead of 14.7. What values did you use?
 
Well in neutral my afr is good it's underload that it's hurting lol.
I used the 1k ohm 1/4watt resistor. I'll post some screenshots of my current tables tonight. Though after adding the resistors I think they'll be a bit off. My map sensor table is one I still need to work on I think it is pulling some of my fuel in WOT. I'll do a quick log and screens tonight and a few vids. Won't be able to do those till after work though with is about 8pm California time. So worst case scenario it'll
Be up tomarrow
 
Hey all,
Looks like I am going to be moving away from the Perfect power to the AEM as I am not having much in the way of success in getting things settled down. Which F/IC are you using? I am leaning towards the F/IC 8 so to be able to get the bloody speedo corrected. Less expensive, overall, than buying the speedo correction electronics in addition to the F/IC

My wideband should be here this week so I can start gathering that data. I am using Palmer Performance Enginnering software on my laptop to monitor the PCM and gather information on what is going on under the hood.

Also, anyone interested in helping me get started with a copy of their program? If so, PM me and I'll send my direct email addy. Thanks in advance.

What I have "works" but it is kind of clutzy. Calculations say a 35# injector, what are you using. At the price of injector sets, I really would like to get it in one. Displacement is 4.0.
 
Well you want the F/IC 8 so you can control that 7th injector, right? There is no speedo calibration with the AEM.
 
i read somewhere on the AEM forum that the fix for the part throttle leanout is to have a value of "1" in all the zero valued cells of the fuel map. don't know how true is that.

and I thought you only need to wire the pre-cat sensor not both?

by the way what did you used for the wiring , did you use the aem patch extension harness? or did you cut the factory wires? if you know anyone who has an extension harness for the FIC for our xj's please let me know.
 
Apparently I was one of the last ones to get a harness. I paid $145 for the harness and $315 for the FI/C 6. I just wanted to be able to remove all at the drop of a hat and not chop up the stock harness, so $145 was fine for me(even though I have wiring/soldering skills). The FI/C includes a bypass harness so you can remove the unit and plug in the bypass w/o any issues, so don't make the lack of the extension harness the deciding factor if you want to use the FI/C-6. O-gauge is running the sprintex charger which utilizes a 7th injector which sprays into the charger and thus the manifold, so he needs to control 7 injectors, thus he needs an FI/C-8, or so I think, so the 1913 is not the unit he wants, but the 8-cylinder version of it(even though he won't use the 8th injector).
 
Last edited:
So, either the F/IC 6 or the 8 will controll an "extra" injector. It is timed to fire with injector number 1. The F/IC 8 (30-1930) instructions, page 13, shows how to make the speedometer connection.

I have purchased a set of 40# injectors (after doing more research, turns out a 39.5# would be a better choice) and am basically walking away from the perfect power unit. The extra injector idea I still believe is valid, but the way the timing is being handled I very much disagree with, hence the AEM...

The harnesses no longer exist. As I documented in another thread, the manufacturer of the PCM side connector stopped making the connector due to a lack of sales volume. So, it is slice and dice the factory harness...

Per my telephone discussion with AEM, either the 30-1910 or the 30-1930 F/IC will work in my application. The decision to be made is speedo calibration or not. They also say that if you have a 4 cylinder and have a F/IC 6 or 8 laying about, feel free to use it. The way it works, injector driver ports not connected cause no problems, the circuitry just sits and waits.

So, I guess I will see what happens. Still trying to find the least expensive place to purchase the F/IC.
 
Sorry for the late reply in the middle of moving. I'm using the 30-1913 on mine the srt4 specific model. Also I cut into my factory harness I had the option to buy the patch on amazon at the time for $50 when they clearenced them out. I bought my fix from bisimoto other cheapest place for the fic has been amazon.

As far as the 1 in every box I have no zeros in my map so that rules that out dang lol.
 
Do not get the 1910 unless you want a CEL for interupting the injectors. Get the 1913 FIC-6 if you aren't gonna use the 7th injector and the FIC-8(I don't know what the model # is for the 8 cyl)if you are. There is no speedo calibration with AEM FICs. I don't know if you can drive the 7th off the 1st so do some research on AEM's forums.
 
I will call them again, but...

Page 13 of the manual shows the connection and page 25 describes how to program it. You use the MAF channel and alter the frequency sent to the PCM. As percentage is one of the three types of calibration methods, I would think it to be the most straight forward.

I will call them again. I will ask about the 1913 also. Why the 1913? Does it load the PCM differently? If it does, then there is a F/IC 8 for chryco (30-1931) engines as well.

More research...

FEATURESF/IC-6F/IC-8Injector Channels68Advanced Injector Load Simulation & FilteringNoYesTiming Channels (Cam + Crank)35High/Low Voltage Selectable MAG-Driver OutputsNoYesTPS InputYesYesMAP Sensor (Onboard)YesYesMAP (0-5v Intercept)YesYesMAF (0-5v Intercept)YesYesFrequency Based Flow Meter SupportNoYes*Speedometer RecalibratorNoYes*o2 Sensor RemappingYesYesExternal AFR InputYesYesGeneric 0-5v Remappers22Boost Controller (Requires AEM 30-2400 Solenoid)NoYesIAT Logging InputNoYesPC DataloggingYesYesInternal Logging Memory64 Kb2 MbVTEC Output/Control/+12V Switched OutputYesYesFEATURESF/IC-6F/IC-8Injector Channels68Advanced Injector Load Simulation & FilteringNoYesTiming Channels (Cam + Crank)35High/Low Voltage Selectable MAG-Driver OutputsNoYesTPS InputYesYesMAP Sensor (Onboard)YesYesMAP (0-5v Intercept)YesYesMAF (0-5v Intercept)YesYesFrequency Based Flow Meter SupportNoYes*Speedometer RecalibratorNoYes*o2 Sensor RemappingYesYesExternal AFR InputYesYesGeneric 0-5v Remappers22Boost Controller (Requires AEM 30-2400 Solenoid)NoYesIAT Logging InputNoYesPC DataloggingYesYesInternal Logging Memory64 Kb2 MbVTEC Output/Control/+12V Switched OutputYesYes
 
So I happily throw myself onto my sword. the 1913 is the correct F/IC for the throw no code reasons stated here. My thanks for preventing me from making a mistake. By the same token, it looks like the 1931 is the one I'll be needing. You know, I really like this site for the help you get.

It is true that the F/IC 6 can not calibrate a speedo. That capability (among others) happened with the F/IC 8. Would be nice if there was a 6 cylinder version of this but...

you can just replace the drive gear, but the speedo will not be accurate. As most are aware, I am a retired Engineer and am cursed with the dreaded "get everything as close to perfect as possible" disease. When I built the 97 (2003) I used the 241OR TC and corrected (well..) the speedo using external electronics. Those using the TC know it has a tone ring instead of the clutzy gear driven sensor arrangement the 231 uses. At $125 a pop for Speedo drive gears, the $140 for the F/IC 8 is a reasonable cost differential for accuracy.
 
So after speaking with AEM, I went ahead and snagged a 30-1930 F/IC 8. The injector driver input circuitry matches that of the 30-1913 and I am assured that no codes will be tossed. I asked them what was changed between the 1910 and the 1913. In particular I asked if there was a resistor value change in the input trigger. I assumed a lower value resistor to increase the current seen byt the PCM and the Tech Support guy said..."Yup". A succinct answer to be sure. I asked the question as I figured I was not to only one wondering. They also said that if someone has a 1910, they can send it in and get it converted. Speedo calibration was confirmed as an available ability. Will let you know how it works. We (EO Fab and I) are going to get the 1993 Supercharged YJ sorted first with a 1913 unit. Once that is done, SC kits will be available for ODBI HO motors.

FYI, the 1931 Hemi version of the F/IC 8 has to do with an unusal thing the factory PCM does. It routinely wakes up and takes a look around. Finding no problems, it goes back to sleep. Weird...
 
You must log in or register to reply here.

Similar threads

F
4.0 eaton supercharger & AEM F/IC help
Replies
16
Views
3K
O-Gauge Steamer
O
H
Quick AEM F/IC question (gradon, boostwerks)
2
Replies
21
Views
2K
h-townxj
H
sjkimmel99
obdcom code reader and sensor display
Replies
2
Views
2K
sjkimmel99
sjkimmel99
Back
Top