[Gmecm] 7747 High BLM at idle

[Mark Romans]

It doesn't always follow logic directly.  There may be other factors, intake 
resonance, who knows.
If you can see what cell it's running lean in, the simply add to that cell. 
I generally try to smooth the transitions to the surrounding cells too.
Just give it what it wants.
Mark
----- Original Message ----- 
From: <charles at taildragger.info>
To: <gmecm at diy-efi.org>
Sent: Friday, August 19, 2005 8:06 AM
Subject: Re: [Gmecm] 7747 High BLM at idle


> Yeah, I'm able to see exactly which cell I'm in using the winALDL program.
> When I'm in gear, it's in a different cell, and things seem normal.  When
> I go to park, it switches to another cell and the BLMs in that cell go way
> up.  I'm not just looking at a BLM stream, I'm looking at a table of
> recent or averaged BLM values as a function of VE table cell.
>
> I could just try to tune it out with the VE table, but I find it hard to
> believe that the table is nearly perfect everyplace except one cell which
> is way, way off.  Has anyone on the list had such a thing; where the
> factory table was almost perfect except for one or two cells?
>
> Thanks for the help.
>
>> 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
>>>
>>>
>>> _______________________________________________
>>> Gmecm mailing list
>>> Gmecm at diy-efi.org
>>> http://lists.diy-efi.org/mailman/listinfo/gmecm
>>>
>>
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