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Re: Idle richness with 7747.



Kevin Reynolds wrote:
> 
> >
> > The idea is to get open BL as close to 128 as possible.  The accepted
> > range from GM is 128+/-10, so your calibration is still too rich, even
> > though the O2 is able to correct it.
> 
> It's better in the areas I've been playing with, just haven't found the right tables for the area I'm having the problem with.
> >
> > You realize that as far as the ECM is concerned, it is hitting
> > 14.7:1.  Without the feedback from the O2 sensor, it just calculates
> > fuel delivery based on the numbers in the prom.
> 
> That's what I'm figuring. Somewhere theres a table telling this thing to put in x amount of fuel so it cam be at y AFR. If I can find out where this setting is I can fudge the figures it thinks it's at so it's "realworld" AFR is where it's supposed to be.

I didn't say that right.  The tables tell it to put in fuel for x
amount of time.  The open loop a/f ratio is up to you, and is based
entirely on the numbers you put in the tables.  Remember, no feedback
in open loop.

> So far I've only burned a couple chips checking this out, I just thought maybe someone knew of a table I was missing. 
> 
> Kevin R
What tables are you working with now?  What locations are they at?
Shannen
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