Couple of MAP sensor questions

[Marteney, Steven J.]

There are 3 vacuum ports (not including the power brake booster port) on the
TPI plenum (that I remember).  One is underneath the plenum right behind the
throttle body and it is dedicated to the EGR system.  Two more are on the
passenger side.  One hooks only to the pressure regulator, the other is the
one that is T'd.  Some of its lines go into the wireing harness and I assume
go to the A/C controls.  The other lines I'm not sure where they go, don't
remember.  I don't see any other places to put it unless I 'T' it.  And I
hate to do it on the line that's already T'd twice.

Steve

-----Original Message-----
From: Barry Tisdale [mailto:btisdale at cybersol.com]
Sent: Monday, July 30, 2001 11:44 AM
To: gmecm at diy-efi.org
Subject: Re: Couple of MAP sensor questions


While not being at all familiar w/ your manifold or plenum, the best way is
to provide a separate vacuum source for each device, i.e., no 'tees' or
anything.  Is this do-able on your setup?  Easier to troubleshoot, too.

Barry

At 09:26 AM 7/30/01 -0400, Marteney, Steven J. wrote:
>Okay, I'm slow and I admit it, but the 165-730 conversion is just about
>underway.  Would have been this weekend but other projects got in the way.
>I have a couple of questions on hooking up the MAP sensor.  
>1) I know Bruce says use the hard vacuum lines but I'm wondering how long
of
>a hard line is too long.  I've been stealing a lot of stuff out of a 6000
>and I got a piece of hard vacuum line with rubber boots on each end.  It's
>about 3 feet long.  Is that too long?
>
>2) Will a 'T' in the line effect the MAP sensor operation?  One vacuum port
>on my plenum already has two T's in it (not my doing) and I hesitate
putting
>in a 3rd.  The only other one (easily) available is hooked to the pressure
>regulator.  I thought about T-ing that one.  Bad idea?
>
>Thanks!
>Steve
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