Noob AFR questions

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10-09-2010, 10:14 PM

jbresee

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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?

Attached Thumbnails

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CurrentTune.msq (36.3 KB, 142 views)

2010-10-09_16.46.58.msl (1.02 MB, 79 views)

10-10-2010, 07:54 PM

jbresee

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

10-10-2010, 09:50 PM

shuiend

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

10-11-2010, 07:16 AM

jbresee

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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

10-11-2010, 07:52 AM

shuiend

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Quote:

Originally Posted by jbresee

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.

10-11-2010, 08:08 AM

Braineack

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what's the problem?

10-11-2010, 08:11 AM

jbresee

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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

10-11-2010, 08:29 AM

Braineack

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looks like overrun to me.

10-11-2010, 08:36 AM

jbresee

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

10-11-2010, 08:38 AM

#10

richyvrlimited

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

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

10-11-2010, 08:53 AM

#11

Braineack

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Quote:

Originally Posted by richyvrlimited

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

and that's happening.

10-11-2010, 10:05 AM

#12

richyvrlimited

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

10-11-2010, 10:08 AM

#13

Braineack

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

10-11-2010, 10:31 AM

#14

richyvrlimited

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

Apologies for dirtying the thread up

10-11-2010, 10:46 AM

#15

jbresee

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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