ebuyaer2002
New member
Sent you a message MTD
How To: AEM F/IC-6 Install, Tuning, and Help Thread
- Thread starter MTD
- Start date
It doesn't seem like this thread is real active but Ill update it anyway.
After receiving the URD patch harness and making my connections again, I found several mistakes that I had made from my first attempt. I got confused only following MTDs chart and after looking closer at AEMs directions I got it right the second time.
However I am having another issue now.
I am not getting any voltage through the O2 sensor resistor. At first I thought the 10k ohm resistor was too much so I stepped down to a 2.2k, which initially worked but would occasionally not pick up the voltage at start up so I then tried a 1.5k, and now a 1k ohm resistor all with no voltage being picked up by the FIC6.
Do you think my Oxygen sensor is on its way out and is getting weak?
When it was working with the 2.2k resistor I was able to do some tuning and the AFRs were responding to my O2 skewing, so I feel like it was functioning.
Im not getting any CEL but I can't really drive the truck either, it starts fine but stays in Open loop and runs extremely lean at ~18 afr.
After receiving the URD patch harness and making my connections again, I found several mistakes that I had made from my first attempt. I got confused only following MTDs chart and after looking closer at AEMs directions I got it right the second time.
However I am having another issue now.
I am not getting any voltage through the O2 sensor resistor. At first I thought the 10k ohm resistor was too much so I stepped down to a 2.2k, which initially worked but would occasionally not pick up the voltage at start up so I then tried a 1.5k, and now a 1k ohm resistor all with no voltage being picked up by the FIC6.
Do you think my Oxygen sensor is on its way out and is getting weak?
When it was working with the 2.2k resistor I was able to do some tuning and the AFRs were responding to my O2 skewing, so I feel like it was functioning.
Im not getting any CEL but I can't really drive the truck either, it starts fine but stays in Open loop and runs extremely lean at ~18 afr.
gamefreakgc
Elite Member
I'm not an expert, but do have a few thoughts.
Do you have an A/F ratio sensor or a older narrow band O2?
If narrow band, you need the 10k resister. If A/F ratio sensor, you need none, I believe.
gamefreakgc
Elite Member
Then I think the 10k resistor is pretty much a non-negotiable. Try switching it out and I think you'll get better results.
With the 10k resistor in place the truck won't come out of Open loop mode because its not picking up the O2 sensor. Even with the bypass harness in place of the FIC6, it won't come out of open loop.
gamefreakgc
Elite Member
Ahh, gotcha. I'm guessing it's probably got a pending CEL as well then? I know the AEM unit has O2 skewing as well, but I think it does need that closed loop signal for the ECU to work properly like you're experiencing.
I know that there's not a whole lot of us over here running the AEM FIC 6. I've only looked into running it since my charger is not stock anymore. You might have some luck posting over at customtacos.com as well, there might be a difference with the ECU and how it interacts.
My only other thought is that yours is working more like the A/F ratio sensor, and that you may not need a resistor at all. But even with the 10k resistor, you should be getting some voltage. Do you have a multimeter? I would test continuity from the sensor side of the harness to both the AEM unit and the ECU (or appropriate wires). I think there might still be an issue with your wiring.
Well after getting the truck running somewhat nicely on the stock injectors I am now trying to run the 305cc green 7mge Supra injectors (pn23250-70080)
And I am having issues. The truck is running WAY rich, it will start and barely idle but after startup the afrs immediately plummet to ~10.4. I initially went into the settings for the fuel map and did the injector size change from the old 240cc injectors to the new 305cc injectors, this gave a net -22% fuel trim.
So Ive have done the following trying to trouble shoot it:
Ive played with the IRT inputting everything from 0 all the up to 4000 microseconds. It maxes out at about 4050ish and at that max it seems to smooth out the idle a little and the injector duty rises up from 1% to 2%. But the afrs still don't move off of ~10.4.
When I adjust my fuel map for less fuel, I can kill the truck at around -50% or so but again, afrs still don't move.
Blocked off the air assist vacuum lines from the IAC- didn't seem to make any difference.
Swapped a different MAF sensor in- no difference.
The truck has a new front o2 sensor with ~500mi on it.
Anyone who's controlling larger injectors with the FI/C6 have any input?
And I am having issues. The truck is running WAY rich, it will start and barely idle but after startup the afrs immediately plummet to ~10.4. I initially went into the settings for the fuel map and did the injector size change from the old 240cc injectors to the new 305cc injectors, this gave a net -22% fuel trim.
So Ive have done the following trying to trouble shoot it:
Ive played with the IRT inputting everything from 0 all the up to 4000 microseconds. It maxes out at about 4050ish and at that max it seems to smooth out the idle a little and the injector duty rises up from 1% to 2%. But the afrs still don't move off of ~10.4.
When I adjust my fuel map for less fuel, I can kill the truck at around -50% or so but again, afrs still don't move.
Blocked off the air assist vacuum lines from the IAC- didn't seem to make any difference.
Swapped a different MAF sensor in- no difference.
The truck has a new front o2 sensor with ~500mi on it.
Anyone who's controlling larger injectors with the FI/C6 have any input?
MTD
New member
When I installed those injectors and used the injector size chart it was pretty far off. Its been awhile since I've messed with mine now, but when I tuned it I found that monitoring my short term fuel trims to be invaluable. With out monitoring that I had no way of knowing where to set my o2 map and you have to have that o2 map in sync with your fuel map.
MTD
New member
Yes this absolutely the only way to tune this type of system.
Sent from my XT1585 using Tapatalk
superchiem
New member
Hi every one!
I'm fairly green to the AEM stuff and need some help. I followed MTD's great write up and the truck fires up, but I am getting a p0340 even with the 2.2k resistor on cam1magi- and cam1magi+ has anyone run into this? I bridge them on the trucks harness not the AEM harness. Should I bridge on the AEM harness?
Thank you,
superchiem
I'm fairly green to the AEM stuff and need some help. I followed MTD's great write up and the truck fires up, but I am getting a p0340 even with the 2.2k resistor on cam1magi- and cam1magi+ has anyone run into this? I bridge them on the trucks harness not the AEM harness. Should I bridge on the AEM harness?
Thank you,
superchiem
gamefreakgc
Elite Member
Unfortunately this thread sort of died, and I don't have one on yet.
You can try customtacos.com, they have a good number of people with the AEM system and the same install as our 4Runners.
You can try customtacos.com, they have a good number of people with the AEM system and the same install as our 4Runners.
was looking into running the same setup for my supercharger but it seems there are many issues with this AEM setup for the 5FV-FE motor.
I have a 2004 tacoma crew cab (same engine) and wanted to upgrade to supeercharged but now im giving it second thoughts.
did the AEM with larger injectors work out?
or should i just go with the URD 7th injector kit.
gamefreakgc
Elite Member
AEM drives larger injectors just fine. Just take it to a dyno shop to have it tuned professionally and they can get it to idle well. When I get mine wired up I plan to have it tuned, not going to try it myself since I don't know what I'm doing.
Customtacos.com has a ton of info on the AEM FI/C 6 for Tacoma users, your ECU is a little different than ours.
I did finally get the correct set of injectors working.
The correct injectors are the 23250-46030 supra injectors. Now the AEM fic6 runs them perfectly, much happier now.
gamefreakgc
Elite Member
Anyone have photos of how they mounted their AEM FIC 6? I have it wired up but have no clue where to put it. I have a patch harness to smash in there too. My boost line provided isn't long enough to put in the glove box.
