7747 hiway spk/fuel mode

[den Broeder, Ernst]

The .ecu file is part of the contents of the hiway747.zip package...

Ernst

At 11:21 AM 1/24/01 -0700, you wrote:
>Haven't seen the *.ecu file...anyone got a copy ??
>
>Lyndon.
>----- Original Message -----
>From: den Broeder, Ernst <edenbroe at cisco.com>
>To: <gmecm at diy-efi.org>
>Sent: Wednesday, January 24, 2001 8:39 AM
>Subject: Re: 7747 hiway spk/fuel mode
>
>
> > 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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