Noob AFR questions
 

Any thoughts on what's going on with my AFR in this log?

I've made the following changes this year:

1. Changed from Megatune to Tunerstudio
2. Changed from stock 1.6 injectors to 320cc Supra injectors. These were cleaned and flowed checked.


Any idea what I boogered up?

Help me find my way, oh great oracles of Megasquirt, as I am clearly lost!

You did change the required fuel ratio right? Also can you post a full datalog?

I did change required fuel, but I could have screwed it up.

The full data log was attached. Is it corrupt?

Thanks for your thoughts on this!
Jim

Ahh, I did not notice it below the pictures. I will try to take a look at it tonight when I get home.

what's the problem?

I'm concerned about the very lean AFR spikes.

The AFR seems to lean out, without any pattern that I can discern. Am I worrying needlessly?
Thanks,
Jim

looks like overrun to me.

Brain,
How would I attack an overrun issue?
Thanks,
Jim

if it was overrun fuel cut there'd be no injector PW.

Has the OP told TunerStudio what WB02 he's using?

and that's happening.

On the pic it wasn't/isn't sorry, didn't notice the logs.

but it does in that pic. It cuts fuel just moments before it goes full lean; there's a delay.

God i'm a retard, hell of a delay that mind

Apologies for dirtying the thread up

Ahhhh.....

I hadn't noticed the PW dropping to zero. So this ends up looking like a non-problem, and the way I could tune around it is to go into the over run settings in TunerStudio and bump up the kPa that it uses for the fuel cut.

Do I understand that correctly?
Jim