Timing Retard w/o knock & MAF oscillations

[David Cooley]

At 03:32 PM 9/24/1999 -0400, you wrote:
>In message <4.2.0.58.19990924105438.00955100 at 127.0.0.1>,David Cooley writes:
> >At 10:45 AM 9/24/1999 -0400, you wrote:
> >>In trying to understand some Diacom data. I'm seeing "knock retard" being
> >>introduced, but No "spark control counts" being sensed..  Will the ECM
> >>retard the timing when the table jumps from LV8 column to LV8 column and
> >>the requested advance decreases in this column jump?
> >>
> >Nope... Would just show as a different value in the timing advance data...
> >retard is when it pulls timing due to knock and it's modifying whatever
> >value is in the timing table.
>
>So then the original question goes back to, "How can Knock Retard be
>introduced by the ECM, when there are no spark control counts"?

I;ve seen both items happen... spark control counts increasing with no 
displayed knock retard, and knock retard with no spark control 
counts...  Usually it's caused by a flaw in the Diacom software... My buick 
used to show ambient temp as 65 degrees when it was 65 degrees, but at 100 
degrees it had only increased to 75...   The raw ALDL data converted to the 
proper values though.  there were several other parameters that were way 
off in my Diacom data...
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David Cooley N5XMT Internet: N5XMT at bellsouth.net
Packet: N5XMT at KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068
We are Borg... Prepare to be assimilated!
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