GEN II setup instructions, help needed!!

[CGASTON]

Yes... When idling, after engine is warm. Should be open loop. It is one of your chips (E85). My BLM is 129, O2 are 820-870, TPS is .42 key one and .44 running, IACs are 16-19

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[Eric Stage I]

That's not uncommon for the A/F to move around a bit under those conditions. I would not be too concerned about it. Could be an electrical load, like fan turning on/off. Also sometimes you can get small misfires at idle that will cause momentary lean readings. As long as its idling ok, then it should be fine.

 

[CGASTON]

I was wanting to think that was the way it was suppose to be. I am going to drive it around a little this weekend and will post from there!!

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[TurboDave]

Ya, and over what span of time? I run my car in ECM closed loop (except idle), and it's common for the air fuel ratio to move around a lot if you move the accelerator at all while driving. Particularly in traffic where you're on and off the accelerator a lot. It's not uncommon to see it mover over even a wider range than you've seen.

Now, at WOT where AFR tracking is turned on, it should not vary that much, assuming you have AFR tracking activated and have a specified value entered in the table.

 

[CGASTON]

I do have the GEN II monitoring the A/F, but not really sure on how you make it auto correct.

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[TurboDave]

There's a whole section near the back of the GEN II manual on AFR correction. HIGHLY suggested reading!

Basically if the gain in AFR tracking is set to 0 (zero) it turns the correction off. Any value above 0 turns it on. Read, read, read.

 

[CGASTON]

After reading that manual several hundred times, I should have remembered that