Re: MAP signal dampening

[Ward <WSpoonemore@excite.com>]

Bruce you absolutly correct. if you try to mechanicaly filter the MAP it
will be wrong some where else. This is fixing a leaky fountan pen with a
rubber glove.

Ward


On Fri, 10 Mar 2000 15:07:12 -0500, gmecm@diy-efi.org wrote:

>  Remote mounting,and large lines can dampen the MAP signal, but that's
>  usually exactly what you don't want to do.  I'd recommend looking in the
>  code for filtering rates or such.
>  Unless you want a delayed response to everything else, ie transistions.
>    I've tried min cross section hoses with 1-2-3 orfices in them, large
line
>  (3/8") with restrictors, small tomato paste cans used a dampening
volumes,
>  I have never gotten very good results with any of it.
>    There is no universal answer for this, as far as I know.
>    Big cams have a lumpy idle, bigger cams have a lumpier idle, if that's
>  what your talking about.  The dumber the ecm is at idle the less this is
a
>  problem.
>    I after trying lots of answers, I perfer to use the oem gm small
plastic
>  hose (ie 1/16" ID), and mount it as close to source as possible.
>    If you keep hitting the ASR (anti stall routine), and see the IAC jump
all
>  around, then try the different pintle route.
>    Sometimes lots of advance helps (at idle).
>  Grumpy
>  
>  ----- Original Message -----
>  From: Swayze <kswayze@bellsouth.net>
>  To: <gmecm@diy-efi.org>
>  Sent: Friday, March 10, 2000 2:31 PM
>  Subject: MAP signal dampening
>  
>  
>  > will remote mounting a map sensor (attached to manifold with vacuum
hose)
>  > dampen some of the idle fluctuations or average out the MAP signal?  If
>  so,
>  > what is the proper ID tubing?
>  > byE
>  > Mike
>  > Swayze
>  >
>  
> 
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>  


Ward





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