EGR tuning

[Programmer]

Tuning with EGR...hmmm never (actually ever) entered
EGR in the equation. Some guys like it, I never liked
diluting the AFR with an inert gas to control something
that good tuning can take care of... not saying it can't be
done, btw. Tip in EGR problems can be too much
exhaust back pressure, or putting a bleed on the solenoid
to delay EGR slightly. Does the EGR valve have an "N" on
it with the part # ?
Lyndon.
-----Original Message-----
From: Ernst denBroeder <edenbroe at cisco.com>
To: gmecm at diy-efi.org <gmecm at diy-efi.org>
Date: October 5, 2000 9:28 PM
Subject: EGR tuning


>Howdy all,
>
>I need some direction in how to go about tuning the EGR tables in '7747.
>The computer is controlling a tbi2.8L v6 in a S15 Jimmy.  I'm at the point
>now where I'm happy with the current tuning and I want to re-enable the
>EGR, however because I'm using a tweaked APAB (4.3L tbi bin) the stock
>EGR tables in that chip are not correct for my motor.  I'm experiencing
>tip-in hesitation at cruise.
>
>I've combed the archives for EGR info, and I've walked away from that
>experience knowing more about how EGR works and how to diagnoise faults
>but I couldn't find anything on tuning ideas for EGR.
>
>Does anyone have any experience doing this?  I haven't the foggiest idea
>of where to start...
>
>Thanks,
>Ernst
>
>
>
>
>
>
>
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