VE tuning questions...
TECH Enthusiast
Joined: Jan 2003
Posts: 582
Likes: 0
From: Birmingham, AL
If DFCO is kicking in, I believe it'll skew your values toward the lean side since it's cutting fuel. Set a filter to discard decel fuel trim cell. Or, you could set the DFCO Enable Temp to 284 degrees to disable it and not have to filter anything 
Here's a basic guide for fuel trim cells that I got from the HPT site:
Fuel Cell Load condition Operating condition
0 Non-load Coast
1 Non-load Deceleration
2 Non-load Deceleration/Cruise
3 Non-load Deceleration/Cruise
4 Non-load Part throttle
5 Non-load Part throttle
6 Load Part throttle
7 Load Part throttle
8 Load Part throttle
9 Load Part throttle
10 Load Part throttle
11 Load Part throttle
12 Load Part throttle
13 Load Part throttle
14 Load Part throttle
15 WOT 100% load
16 Idle (Warm) A4 (P/N) A/C on
17 Idle (Warm) A4 (P/N) A/C off
18 Idle (Warm) In Gear A/C on
19 Idle (Warm) In Gear A/C off
20 Idle (Cold) All conditions
21 Non-load Moderate to high deceleration
22 WOT <100% load
While it may not be intuitive, cells 0-15 are overlayed on the VE table and look something like this:
0 1 2 3
4 5 6 7
8 9 10 11
12 13 14 15
As mentioned earlier by ninobrn99, fuel trim cells (FTCs) can be filtered via PID.6310. To do this create a logical expression in the histogram setup screen to include/exclude FTCs you wish.
For example: [PID.6310]<15 and [PID.6310]>0
will remove coast (FTC 0) and idle (16-20) and WOT (16 & 22) from your histogram.
Fuel Cell Load condition Operating condition
0 Non-load Coast
1 Non-load Deceleration
2 Non-load Deceleration/Cruise
3 Non-load Deceleration/Cruise
4 Non-load Part throttle
5 Non-load Part throttle
6 Load Part throttle
7 Load Part throttle
8 Load Part throttle
9 Load Part throttle
10 Load Part throttle
11 Load Part throttle
12 Load Part throttle
13 Load Part throttle
14 Load Part throttle
15 WOT 100% load
16 Idle (Warm) A4 (P/N) A/C on
17 Idle (Warm) A4 (P/N) A/C off
18 Idle (Warm) In Gear A/C on
19 Idle (Warm) In Gear A/C off
20 Idle (Cold) All conditions
21 Non-load Moderate to high deceleration
22 WOT <100% load
While it may not be intuitive, cells 0-15 are overlayed on the VE table and look something like this:
0 1 2 3
4 5 6 7
8 9 10 11
12 13 14 15
As mentioned earlier by ninobrn99, fuel trim cells (FTCs) can be filtered via PID.6310. To do this create a logical expression in the histogram setup screen to include/exclude FTCs you wish.
For example: [PID.6310]<15 and [PID.6310]>0
will remove coast (FTC 0) and idle (16-20) and WOT (16 & 22) from your histogram.
