Hmm, I do have an injen intake with k&n filter. Maybe this is why I could not use this traditional method(as I mentioned above) to get my FTs right. I had about 30 combinations to try and get my FTs right, most all of which I didn't document.

Tephra, I'll make the changes you mentioned (unless you agree about the MAF scaling), then post my results. Mplspilot, I posted my current MAF scaling- maybe I could get another .02 from ya about what I can try from ya once we see the results of adding a little latency.

Thanks for the help guys.

 

Well I havn't much experience with scaling the MAF due to intake modifications.

 

Not necessarily true, I am on E85 with FIC 1050s and my scaling is at 886 with LTFT low at -5 and LTFT mid at -4 with the STFT bouncing around from -+4

 

New results after adding a bit more latency:
3.312
2.184
1.632
1.248
0.936
0.552
0.408
860 scaling
Cruise FT = -12.25
Idle FT = -10.09

I'll assume my next step is to add about 10% to my scaling.

 

yup.

try 900 first, then 950 (or whatever the closest ecu value is)

 

Well here's the results, after scaling the injectors up:
3.312
2.184
1.632
1.248
0.936
0.552
0.408
943 scaling
Cruise FT = -11.2
Idle FT = 3.04

All of this is cruising on the highway with no boost for 20 min, and idling for a combined total of about 20 minutes for no longer than 6 min or so at a time before and after cruising. What can I try now, since this method isn't working right?

 

Give a try to what i suggested. Set the scaling at 860, set 14v at ~.750-760 and other voltages accordingly. Search for "how-to rescale MAF" thread in ECUFlash subforum. Rescale your maf and depending on your idle trim % increase 35hz and 50hz lines as described in the original "Rescale your MAF" thread.


Also when you will be adjusting your MAF scaling, don't wait 20min at a time. Disable your closed loop (put 222 in your "Min Temp for closed loop" table, clear CEL later). Adjust MAF units, start the car and watch the AFR. You want the AFR to be 14.7, so if it's leaner or richer, adjust MAF accordingly, reflash. Rinse, repeat.

 

I didnt say it wouldn't work, i said it's wrong. You can scale them 1200 if you want, they'll work. You'll just have 7's all over your open loop fuel maps and potentially issues with swinging afr's and maybe cold and idle operation.

 

Well, I followed what you said above and got my car idling at around 14.5 AFR in closed loop. I attached my MAF scaling table, should I be changing other values to smooth what I changed? Here is my current latencies/scaling:
3.624
1.992
1.344
0.984
0.744
0.576
0.456
860 scaling
Cruise FT = -6.9
Idle FT = 5.59
Should my idle FT still be 5.59, even though I got it at around 14.5? Should I keep adding 25 and 50Hz until my idle FT's zero?

 

New settings:
3.624
1.992
1.344
1.08
0.792
0.576
0.456
914 scaling
Cruise FT = -9.5
Idle FT = -0.09

 

Increase scaling to the next higher step.

 

New settings again:
3.624
1.992
1.344
1.080
0.792
0.576
0.456
943 scaling
Cruise FT = -4.6
Idle FT = 1.86

Ideally, would I smooth this entire maf table from 19-1600 or just adjust idle like I did? 145->235 is pretty drastic. Also why would I need to scale these 1000cc injectors so high, compared to most people?

 

Go up one more on the injector scaling and increase all the latency values by 0.020.

 

You can smooth those out on the bottom. I don't recall what i have exactly, something like this (from the bottom):
175
190
190
185
182
and stock values thereafter.

You can adjust cruising trims at corresponding Hz too using this method (~140-200), if you ever wanted..

Also it's nice to have the trims in check, but what about your main problem with going lean? I'd focus on that. Once you fix that you may need to revise your scaling/lat/maf etc.

 

I guess this thread turned into 'let's get my FT's settled first, and then address the top-end fuel problem'. I have not been revving or boosting much lately since I was waiting to see if getting my latencies/scalings correct could help. However from what it seems like, I MAY BE OK on pump gas for fuel delivery under higher rpms/loads, but I'm not sure until I get to that point. When I had the tank of E85 I definitely could not get enough fuel up top no matter what I did, leading me to believe that I might have a fuel filter, pump, or fpr problem.

You're right, I would like to address this problem before I set scalings/latencies but drivability with 93 became a higher priority for this winter. I'll probably start playing with E85 come spring.

I'll try to increase my scalings/latencies as stated above. I can't believe I still need to increase my injector scaling to 975, since a vast majority of 1000cc guys run around 860 or even less. I didn't mention, but after a cold start I run at 15-16 AFRs under slight throttle for the first couple minutes of driving until it warms up, and increasing injector scaling will make this worse yet. It idles fine cold and warm though.