cldriver

For those who have OBD scan tool, what % do your long term fuel trim numbers show? The data points look like LTRIM1 and LTRIM2 on the OBD tool.

Mine are showing ~18%...is that high?

alumar

Mine holds 18% Long Term

and here is a shot of my short term on very low throttle (slightly pressing and depressing the gas pedal ...rolling at 20mph to 35mph)

TrimA - Trim B - Throttle position
-5.47 0.00 8.24
0.00 0.00 7.06
0.00 20.31 7.06
20.31 0.00 7.06
0.00 0.00 6.27
21.87 21.09 6.27
21.09 0.00 7.45
-1.56 -3.91 8.24
-5.47 -2.34 7.06
-10.16 0.00 7.06
0.00 21.87 4.71
21.87 21.09 7.06
19.53 0.00 13.33
0.00 -0.78 16.47
-1.56 -0.78 18.82
-1.56 2.34 20.00
5.47 1.56 18.43
-0.78 -3.12 13.33
-5.47 -2.34 12.94
-3.91 -2.34 10.98
-2.34 -7.03 9.80
-4.69 -3.91 9.41
-6.25 -3.91 8.63
-3.12 -7.81 8.24
-7.81 0.00 4.71
0.00 0.00 5.88
0.00 0.00 5.10
0.00 0.00 3.92
0.00 0.00 2.75
0.00 23.44 2.35
23.44 23.44 2.35
23.44 23.44 2.75
23.44 23.44 2.35
23.44 0.00 2.35
-0.78 -1.56 2.35
-1.56 -0.78 2.35
0.00 0.00 2.35
0.78 0.78 2.35

alumar

lots of + and - ...as the ECU is calculating in real time to balance the fuel ratio. The parts that consern me is after I let off the gas or just put down, it spikes to 23% then drops off