Couple of MAP sensor questions

[Bruce]

You want it close to the manifold, and T'ing is fine so long as there is no
vacuum bleed at the other end,  ie brake booster hose / PCV hoses are a
nono.
Short small diameter lines.
On some applications the use an O ring, and mount the sensor to the manifold
(looks to be the best way).
Bruce


----- Original Message -----
From: "Marteney, Steven J." <smarteney at xlvision.com>
To: <gmecm at diy-efi.org>
Sent: Monday, July 30, 2001 12:15 PM
Subject: RE: Couple of MAP sensor questions


> 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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