Here's where I ended up fella's. The ol' Toshiba decided to play fair tonight.

I used mitsulogger to log fuel trims as the installation of the nipple on the intake did squat for sh** at fixing the fuel trims.

Got it up and logging. As mentioned, it was a mess.

I kept adjusting the latencies and watched the +12 +12 slowly fall away from each other. Then the scaling, then as I got closer moving the latencies up I found myself pushing the scaling way back up. I couldn't even get the fuel trims to move at first.

Towards the end I started making large changes in latencies because I was tired of being in the car. And getting rather moody with idle & cruise falling away from each other like a stone instead of shoring up like they were supposed to.

SO...
4.69~3.312
7.03~2.040
9.38~1.296
11.72~1.104
14.06~0.960
16.41~0.504
18.68~0.120

With the scaling @ 750
-12 lo
-11 mid

That is close. Now, if I add 12% of fuel on the scaling.
They should be at;
0
+1

Right? Can you set the scaling over 770? I'd need to be @835 to add 12%
right?
Or am I totally missing something?

ACP will be here to swap a motor soon. I will tell him hello for ya.

 

If the trims are negative then it is too rich.

You need to take away latency.

Did you try JB's suggestion?

 

The -12 may be maxed out, but if it isn't and both are right at -12 and -11, then you take away 12% with the injector scaling (not add). You would increase the injector scaling 12% to get them both to 0.

Were these your LTFT Lo and LTFT mid after a good 10 minute idle and cruise, making sure that the STFT was now bouncing around 0?


Eric

 

here is somthing that might be off topic, but ill give it a shot.
my old Lancer had WB02.....i had a small leak before the 02sensor and couldt really hear it with all the engine noise....so with very litte pressure going though the piping like idle it will leak out....for me when i started to drive around and boost the AFR would read normal, cause im forcing the air though the pipes but the leak wasent big enough to affect anything while driving(cause im forcing a lot more air though everything), just idle around. so in other words you might have a small exhaust leak somewhere....hope that might help somthing....Good luck.

 

To adjust scaling over 770 you need to manually enter it. That scaling works really well from what I remember.

 

I thought -12 was maxed out too. But I saw -13 on cruise once. So I know its actually -12. Which is why I made large changes to latency. I wanted to move it back into a range where I could be sure what I was seeing was not a maxxed out value. When I had my latency values around where JB suggested them my idle/cruise values were 13% apart or more. (I think like +3/-11 If I remember right) I was cruising 2 exits on the E-way. Parking on the off ramp for 15 mintues for idle. Rinse & repeat. Making sure I saw a change to mid during cruise. (55-60mph 5th gear, part throttle)

If I have an exhaust leak anywhere it is after the WB. Which is just off the downturn of the DP. By the end of the day, I had stopped looking at it. And simply watched the lo/hi/lat/batt on the logs.

I should have left the scaling @ 750 and played with latency. It would have saved me alot of time. I kept bringing it down because the idle was so positive, I ended up in the 635 range before I saw the idle in the +/5 range. But the cruise was -13. So I started really altering the latency while I pushed the scaling back up. Trying to bring them inline. I ended where you saw my post last night. -11/-12. Which was when my back had enough of the Recaro's.

I was just worried I couldn't push the scaling up past 770. (since + - won't take you over 770) But I did manually enter it and flash it to the car. I just didn't have any lower back left to be in the car anymore. And I didn't start it either.

Hopefully, 835 takes both values to +1/0
At which point I would know I got it right.


Just seems odd. My lat values are higher than you would see on 1000cc inj.
So I wonder if I'm not tuning around a boost leak, or some other problem.

 

An exhaust leak can definitely affect your AFR readings at idle, so that may be an issue or may not.

I think you should be set with your new scalings. Don't worry too much about what your latency values are or your scaling. I remember tuning FIC injectors years ago. IIRC, they had a very large deadtime compared to others.

I think your new scaling should get you to your +1/0 or very close. As long as you don't have any exhaust/boost leaks, then you will have the injectors dialed in pretty much perfectly.


Eric

 

I agree, the FIC 950's in my Talon wanted 315us as a starting point.

I ended up pulling more fuel on the global, and adding more deadtime if I remember right to finally get my fuel trims close.

I just wanted to get the fuel side locked down before I turned the boost up. Everything "looked" ok at first glance but that was obviously not the case. I should know better. These cars are much better at hiding problems than DSM's. I was +12/+12 on the idiot scale and the car drove fine. No knock, even under boost. And I was hitting my cells pretty close. That says alot for the cars ecu. But I guess we already know its capable of some wonderful stuff.

I have boost leak tested the car recently. But not with the addition of my ghetto-fab get me home LICP. I plan on switching that out for a much more uniform piece pronto. I'll probably be back chasing these again soon. lol...

That's ok. I needed some seat time with this stuff to get a better handle on it.

I will report back when I get a chance to take a drive. You guys are great. I appreciate the help.

-Dustin