7747 hiway spk/fuel mode

[chetwagner at qwest.net]

I have the ecu file that will work with the modifications.  If it is 
needed by the masses, I will try to post it to incoming.  I may not be 
able to place it in incoming, haven't been able to do that for more 
than a month.  If anyone wants it, let me know.

On 24 Jan 2001, at 11:21, Programmer 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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