I guess this goes here.

I got my aem fic and am starting to get a base setup start before i finish up and put the turbo on.
Right now the fic is 0 out. (not my first time using on but first time on a scion)
A few things i am having problems with. Not sure if it is FIC or oem related.
Ill bypass the fic today and try to log some info to compare.

Here are the problems.

1) First the long term fuel trims are kinda high. +14 to +18
When i first got the car without the FIC install i believe they where +12 ish.
I run AC all the time tho. I know ac normally makes pos FT, but not use to a car being that high.

2) Just finish replacing my axle so i can now WOT.
When i go WOT my WB shows 15s-14.8
This cant be normal. In ever car i own the AFR @ WOT was between 12.9-13.8 on NA setups

The car doesnt make any misfire, or pinging sounds i can hear.
I try to add fuel via the FIC in the WOT range. It shows on the AFR that fuel is added but it stumbles and jerks.

current setup is just CAI, header, catback exhaust.

Any help would be great

 

Bypass the fic and the AFR is much better. Im getting normal readings that i get from other cars.

So i guess it probably has something to do with the IRT. Since the map is 0 out.
My current time is 729ms, ill try lowering it

BUT,
I am still having the heavy pos fuel trims 14 to 18 long term, i cant find any vac or maf leaks

 

Went out and mess with some settings today.
Decided to up the % of the MAF map around the MAF where i was in WOT.
I did 3% for all cells above 2.4volts
Did another pull and the car repsoned better and AFR where must better in the 13.9 range

My guess is the fic is some how lowering the oem voltage from the maf signal. Even tho the fic maf in and out where the same voltage.

Ill contunie to work on it.
I hope this helps others if they are having this problem.

 

Did you test and clamp the MAF voltage?

 

Yea i found the problem an postes it in my last post.

Short verison.
The maf needed to be scaled up due to bigger intake tube. Thats on the car.
The problem was still there with the fic bypass just wasnt as noticably.

Obce i rescale the maf sensor i got better fuel terms.