Open/closed loop Jeckyl/Hyde

[Bob Valentine]

Set the FP with the vacuum line disconnected.   You're sure inj. constant
and engine displacement match your setup? In the '730 there is a AFR vs.
temp table, might be something simular in the '165.  

In closed loop, what are the BLM's at idle?   

-> Bob Valentine
-> bob at tecmark.com

At 12:13 PM 3/23/2001 -0500, you wrote:
>I set the fp by applying 10" of vacuum with pump.  Will recheck with car
>in open and closed loop though.  I have thought about changing the inj
>constant, but I'm wondering if the IAC being wide open and killing 4" of
>vacuum is causing the lean condition.  Or maybe, the inj constant is
>right on, but the 6E fuel tables can't feed the engine at idle.  !!But I
>don't want to mess with all that until I know why the IAC is wide open in
>open loop.!!  I think it's closed in closed loop because the ECM wants a
>lower idle than I have set, but it runs great in closed loop and the IAC
>isn't stealing any of my vacuum.  God, I can't imagine this on a MAP car.
>
>On Fri, 23 Mar 2001 10:16:35 -0500 "Marteney, Steven J."
><smarteney at xlvision.com> writes:
>> I'm not smart enough to figure out what your injector size REALLY is
>(SVO rated at different pressure than GM, etc.) but I have two things.
>> 
>> 1) Is the fuel pressure quoted basically as measured at idle with
>vacuum line attached?  If not, if you set it with vacuum line
>disconnected, then pressure at idle is actually high 30's probably.
>> 
>> 2) If it truly is lean at idle in open-loop mode, start setting your
>injector constant to a lower numbers.  This makes the computer think you
>have smaller injectors and when it calculates the fuel mix it will
>deliver more fuel.  When it goes closed loop, the O2 sense is in control
>and will correct if necessary.
>> 
>> Don't know much about IAC stuff, but lowering the constant WILL richen
>the car up at idle.
>> 
>> Steve (89 F-body 350 similar cam)
>
>________________________________________________________________
>GET INTERNET ACCESS FROM JUNO!
>Juno offers FREE or PREMIUM Internet access for less!
>Join Juno today!  For your FREE software, visit:
>http://dl.www.juno.com/get/tagj.
>----------------------------------------------------------------------------
>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
>
>
----------------------------------------------------------------------------
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