Individual Cylinder AF Adjust, was: NTK wb-sensor price

[Axel Rietschin]

----- Original Message -----
From: "Bruce" <nacelp at bright.net>
To: <diy_efi at diy-efi.org>
Sent: Thursday, February 06, 1997 16:33
Subject: Re: Individual Cylinder AF Adjust, was: NTK wb-sensor price
>
> While two cycles may not be exactly the same, there maybe *trends*
involved.
> Seems odd GM would go to individual cylinder trim, if there was nothing to
> be found.   As I recall in some cals, the correction is a constant (not in
> any learn cycle strategy).
> Bruce

Yed of course one can see a need for individual cylinder trim (I actually
use it to enrich a small bit cyl 2 and 3 on my 4-cyl engine - last time I
melted some pistons, 2 and 3 were really badly hurt, much more than 1 and
4). I thought we were talking closed loop individual cylinder "real-time"
correction, which is overkill if at all doable, imho. When making a fuel map
it could be wise to use one WB per cylinder - next to the thermocouple ;-)
but you have to filter a lot to smooth out the variations.

--axel



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