7747 hiway spk/fuel mode

[den Broeder, Ernst]

What ever you program them to (I hope!).  There is an .ecu file with the 
patch that lets you edit an AFR vs MAP table for the lean cruise mode.  I'm 
starting at 15.0 and working my way up from there.

Ernst

At 08:15 AM 1/24/01 -0700, you wrote:
>What do your AFR's end up at ??
>
>Lyndon.
>----- Original Message -----
>From: den Broeder, Ernst <edenbroe at cisco.com>
>To: <gmecm at diy-efi.org>
>Sent: Wednesday, January 24, 2001 7:43 AM
>Subject: Re: 7747 hiway spk/fuel mode
>
>
> > Bob,
> >
> > Lean cruise is working now.  I had to apply the esc_done patch to get it
>to
> > work.  Awesome job!
> >
> > The O2 cross counts is another variable that could be checked to make sure
> > the ECM is in lean cruise mode.
> >
> > Thanks,
> > Ernst
> >
> >
> >
> > >Ok, just checked some of this stuff out. When in hiway mode, learn
> > >on the aldl is off. The mpsi 9000 scanner also showed open loop mode
> > >(this may vary depending upon which status bit the scanner uses).
> > >
> > >When the knock test is done, yes, knock counts will show up on
> > >the aldl.
> > >
> > >Yes again, the values at 0xD54A are used for the knock/ESC test.
> > >The ESC 43 test is actually a 2-parter. Knock is forced, along with
> > >run-away knock checked for.
> > >
> > >The hac has some errors in the comments of these test variables:
> > >
> > >d54a & d54b together is the eng run time prior to test.
> > >d54d is the retard degrees when either ESC 43 test fails.
> > >
> > >If you haven't also added the esc_done patch, you may want to. This
> > >patch sets the 'esc test completed' bit. This allows PE spark and
> > >hiway mode to be operational without the ecm having to force knock.
> > >Note the side effects of the patch: The coolant window and time
> > >delay for PE spark are also bypassed.
> > >
> > >BobR.
> > >
> > >
> > >den Broeder, Ernst wrote:
> > >
> > > > I've been playing with the hiway747 patch, and I'm not 100% sure if my
> > > > calibration is actually even entering this fuel mode.  Is the O2
>sensor
> > > > value going towards ~100mV the only indication that the ECM has gone
>into
> > > > lean cruise or will the 'learn control enabled' bit in the ALDL stream
> > > > change accordingly as well from enabled to disabled?
> > > >
> > > > Are the values at 0xD54A the only factors used to determine whether
>the ESC
> > > > test is done or not?   And will I see the knock counts increase on my
>ALDL
> > > > scanner when this test is done?
> > > >
> > > > Thanks,
> > > > Ernst
> > > >
> > > >
> >
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