749 question(s)

[ECMnut at aol.com]

In a message dated 9/27/00 8:53:02 AM Eastern Daylight Time, 
btisdale at cybersol.com writes:

> 
>  In the SyTy ECM, anybody know the difference between the DESBOOST item
>  (data stream #46) and the DBSTBASE @ #51?  Seems one or both of these would
>  reflect what boost is wanted at a particular TPS/RPM value from the data
>  tables, but neither seems to track this.

Hi  BT, 
I looked at them, and in the data stream I examined,
they are identical.  Why do you say neither seems to track the
desired boost?  I noted that when the boost is significantly below
"desired boost", the WG duty cycle is pretty high.  Then, as actual
boost approaches desired, the WG duty cycle goes down....
It "appears" anyway that the ECM is reacting to the nuymbers,
and changing the wastegate duty cycle..  I'd like to learn more 
on this however.
My sampling is very limited.  I did something to my transmission
during the thunder runs that I was performing for the purposes of
examining this data...  I have another trans, just no time to swap.
Mike V
----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org