I am watching.
I have an 87 4.0 with a 90 manual trans ECU. I also have Nickintime's REM to read the codes.
I am having an issue with LTFT stuck at 154. That is running rich. I recently replaced the O2 sensor with a Bosch (replaced a NTK/NKG). The REM shows the O2 voltage jumping up and down from 1.xx to 4.xx, like it is supposed to do. The REM shows I am in CLSD loop, like it is should be. The STFT is constantly changing, BUT is continuously below 128, running lean. It mostly is showing double digits - 10 to 90. Sometimes it will drop to zero. If it stays there for 3 seconds, the ECU switches to OPEN loop (like is should).
However, the LTFT NEVER changes! What can I do to fix/adjust the LTFT?