ECMlink CombinedFT and AFRationEST skyrocketing

[CiscoBite1Time]

1). Any boost, vac, or exhaust leaks? Boost leak tested 5psi above your max boost with no leaks?
None since last weekend

2). Verified mechanical timing?
Yes.


3). Verified base timing?
Yes. Sitting at 5* when I did a BLT

4). Ignition system
COP or Stock Coil: Stock
Wire brand and Age: NGK 1.5 years
Spark Plug brand, type and Gap: NGK BPRES7 @ .24

5). Motor health (Compression Test)
Cylinder 1: 150
Cylinder 2: 150
Cylinder 3: 150
Cylinder 4: 150

6). Performed basic throttle body adjustments?
Idle Switch: Yes
Throttle Cable: Yes
TPS: YES
BISS: YES

7). Compression ratio
8.5 Ross pistons

8). Any known bad sensors or brittle wiring?
None

9). Any DTC/CEL codes?
None

10). Electrical system
Car off (not running):
Car running:

11). Base fuel pressure and injector values
Base Fuel Pressure: 43.5
Injector Size (cc/min): PTE 880cc

12). Properly calibrated and configured wideband sensor
Sensor Brand: Bosch
Calibration Date: May 2015

13). Type of fuel
Type: 93 octane
Percent of Ethanol:

14). Watched ECMlink how-to videos?
Yes


I recently picked up a new turbo and trying to get my tune dialed in. This is not my DD and I get around to it when I can. Lately I've been messing with my DA tables and I thought I got things down OK for idle and cruise. I have not done any WOT pulls/logs yet.

A couple of weeks ago was my last cruise log (below dated 7/28). Tonight I took the car for a spin and it started out fine. I stopped it and restarted another log half way home. When I got home I started looking at my idle log and realized my combinedFT and AFRationEST were way higher than normal. I did slightly adjust my BISS to try and line up my ICSPosition. My airflowperrev didn't change. Idle dropped a bit.

I turned my car off and reset most everything. Went back to my DA tables and reset those also. Even after all that I still get high readings for combinedFT and AFRationEST. It's dark now so I can't do much. I'm not sure what happened and why all of a sudden it just appeared. I turned the car off for about 30 mins went back and it still does it.

Any ideas?

 

[jakelandry]

Don't use combinedft, use stft and ltft. Stft is deadtime dependent and ltft is airflow/global dependent. Ignore afratioest for now. Go back and look at the ft's individually and report back.

 

[CiscoBite1Time]

Really. I would've never figured combinedft could be disregard according to the available vids on the ecmlink site. I'm reading up again on ltft n stft. I'll do some logging this weekend.

Thanks.

 

[jakelandry]

Combinedft is stft and ltft combined so you can have a stft at +15 and a ltft low at -15 giving the illusion your fuel trims are at 0 when theres a split of 30% between them.