[Gmecm] 7747 High BLM at idle

[Mark Romans]

You need to look at RPM and MAP both at idle in neutral and in gear.  Your 
VE map is ok when you
are in gear, but when you put it into neutral or park, the vacume goes up 
and the point on your ve map where
it's idling in neutral or park is too high (The ve) reduce that part of the 
map until your BL comes back down
to 128.
Mark
----- Original Message ----- 
From: "Charles McDowell" <charles at taildragger.info>
To: <gmecm at diy-efi.org>
Sent: Thursday, August 18, 2005 7:49 PM
Subject: [Gmecm] 7747 High BLM at idle


> My truck has been running okay, but I finally decided to get around to
> gathering some more data to fine tune things.  I hooked up winALDL and 
> drove
> around for a while.  As I drive around, all the BLM table values in 
> winALDL
> show 124-133 or so - not bad really.  The weird thing is that when I pull 
> in
> someplace, put it in park and idle it, the idle BLM cell (800/30 in 
> winALDL)
> just climbs and climbs up to almost 150.  That same cell shows something
> like 133 if I look at it before starting to idle.
>
> Any ideas what this could be, or where to even start looking?  It's a 7747
> for a SBC 350 with automatic, converted from carb.
>
> TIA
>
>
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