[dr_gallup]

I was able to get some oil inside my stepper and solve my idle problems (2 years so far, fingers crossed). Others have replaced it with a simple mechanical screw, claim it's pretty much set it and forget it but they usually put a piece of tubing or such on it so they can make and adjustment if necessary.

 

[dr_gallup]

All,

I did throw my run of the mill OBDII scanner on her and noted nothing significant. I did note, however, that the system shifts to CL (closed loop) at idle, indicating that the ECU is reverting to a base map without consideration of active feedback loops (such as map or o2 - very common). This is where your solution of removing o2 from the circuit confounds me.


Very Respectfully,
Adam

Closed loop means the ECU is getting feedback from the O2 sensor and making adjustments,