[Gmecm] 7747 High BLM at idle

[DV Fagan]

Charles,
I meant to splice in an old vacuum guage and view
vacuum to see if the MAP might be lying to your ECM.
Dennis

--- Charles McDowell <charles at taildragger.info> wrote:

> Man, I've checked over and over for leaks.  I think
> I'm okay there.  I don't
> have a number for vacuum off the top of my head, and
> I didn't log all the
> data last time.  I can see the last 13 raw data
> samples from the MAP and I'm
> around 45.  I'm not sure how to coonvert that to
> inches or kpa or
> whatever... based on my last converted values (235 =
> 97 kpa) it would come
> out to about 19 kpa, but that seems really low.  The
> offending VE cell is
> 800rpm/30kpa.
> 
> -----Original Message-----
> From: gmecm-bounces at diy-efi.org
> [mailto:gmecm-bounces at diy-efi.org] On Behalf
> Of DV Fagan
> Sent: Friday, August 19, 2005 6:17 PM
> To: gmecm at diy-efi.org
> Subject: Re: [Gmecm] 7747 High BLM at idle
> 
> Charles,
> What is the manifold vacuum at idle?  You might
> check your vacuum lines.
> 
> --- Charles McDowell <charles at taildragger.info>
> wrote:
> 
> > 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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> > 
> 
> 
> 
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