Chomping at the bits....egr disable

[rr]

Carl, I'm not too sure on how to read your post? I've used these
settings when I set up my car and it appears to work:

{0x1b8, 1, 1, 1, 0, 0.0, 0, 0.6786,EGR on - *Low VAC Kpa*,,,(set to
0xFD),}
{0x1b9, 1, 1, 1, 0, 0.0, 0, 0.6786,EGR on - *Hi VAC Kpa*,,,(set to
0xFF),}
{0x1bf, 1, 1, 1, 0, 0.0, 0, 0.3906,EGR off - *TPS% Thres*,,,(set to
0x00),}

I've also done the 'set egr enable temp to max' on a '730 w/AZTY, and
it worked for that one.

<a little while later, I just looked at the '747 code...>

Now I understand, what I had been using, (which I believe Carl was the
pioneer of), is from a long time ago. We have since learned a great
deal more.


**The best way is what Carl is saying now, set the egr enable temp to
max, which on the '747 is location 0x1b3, and set it to 0x00. It's an
inverse temperature. Don't forget to disable the diag mask bits for
egr.**


BobR.

(no disrespect meant, I'll stop trying to be funny from now on out,
I never could get the knack for it...)


Carl Summers wrote:
> 
> Yo...
>    And you know what really sucks is when you did it on the fly and changed
> a buch of stuff assuming you were already correct in one
> area.......ahhhhhhhh...... live and learn.
> -Carl Summers
> 
> mailto:intech at writeme.com
> Click on the above link to respond privately.
> 
> -----Original Message-----
> From:   rr [SMTP:RRauscher at nni.com]
> Sent:   Friday, August 13, 1999 8:13 PM
> To:     gmecm at efi332.eng.ohio-state.edu
> Subject:        Re: Chomping at the bits....egr disable
> 
> >From one of Bruces's posts:
> 
> "But, how do you shut off that darn EGR when doing initial calibrations.
> Well, that is a chore, but setting $1BF to 00, $1B8 to FD, and $1B9 to
> FF
> will do very nicely thank you very much.
>      ALSO BE ADVISED, you can have the EGR applied at idle.
> Makes for a lousy idle."
> 
> BobR.
> 
> (yo, carl, should look familar?! <g>)
> 
> Carl Summers wrote:
> >
> > Hi Shannen,
> >       For some reason my memory tells me that the temp enable is in F and
> > the enable is actually inverted.....like 00=255 F and ff=0 F.....and I
> > think I had problems when I set it to 00 so I ended up using 11(hex)
> which
> > should be 234 F.....all I know is I tried it at FE and EGR still
> > worked...thought I had the wrong address, tried inverting it and it
> > worked...hth's
> > -Carl Summers
> >
> > mailto:intech at writeme.com
> > Click on the above link to respond privately.
> >
> > -----Original Message-----
> > From:   Shannen Durphey [SMTP:shannen at grolen.com]
> > Sent:   Thursday, August 12, 1999 11:10 PM
> > To:     gmecm at efi332.eng.ohio-state.edu
> > Subject:        Chomping at the bits
> >
> > I'm working on a 747 bin, trying to disable egr.  Will any problems
> > result from setting the enable temp bit to 255?  Is that equal to 304
> > deg F?
> >
> > Will setting this bit high effectively disable egr, or are there other
> > values that should be changed?
> >
> > Shannen