If you raise the Closed Loop enable temp, is this putting "running" the ECM in the same Open loop mode as just locking the integrator (aldl output byte number 22) and BLM (aldl output byte number 20) to 128 by the max min values.

The "Base Pulse Closed Loop Correction, Scaled 1" (aldl output byte number 19 arap $6E) is still active when the int and blm are locked, but is this adjustment going to adjust anything?

 

It depends. The integrator may still be applied even if the BLMs are locked. Better to just set the enable temp to the max value so it remains in full open loop.

 

Locking the INT isn't the same as disabling closed loop via the CTS enable.

Locking the INT to 128 will prevent changes to the BLM (no short or long term fuel trim). However, the proportional gains will still be active. And the commanded AFR will be the stoich value, not from the open loop AFR table(s).

RBob.

 

Thanks