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Subject:
Re: L98 low vacuum and running rough or not at all.
From: "nocuthere" <res0kx9o(at)verizon.net>
Subject: Re: L98 low vacuum and running rough or not at all.
Lines: 44
Date: Fri, 02 Jul 2004 23:06:05 GMT
NNTP-Posting-Host: 4.61.170.62
________________________________________________
hey -i had the same problem with a 1986 vette l98 it sounds like you need a
valve job or the val;ve springs are weak or collapsed also check the back of
the plentum for a vacum line that goes to the heater control valve for leaks
also the cruise control system
"Mike" <mikeellison3|x|(at)|x|yahoo.com> wrote in message
news:oRVDc.4623$Qj6.1603(at)fed1read05...
> In <febod0dedvuuiofe69d0285mnh52b9uuc7(at)4ax.com>, X-Eliminator
<blablabla(at)aohell.com> writes:
> >With the engine running, take a mechanic`s stethoscope and listen for
> >leaks around the throttle body, plenum gaskets, EGR valve and any
> >other place where you might think that there might be a vacuum
> >connection or leak.
> >
> >========================================================
> >On Fri, 25 Jun 2004 07:22:12 GMT, "cel(at)nospam.com" <cel(at)nospan.com>
> >wrote:
> >
> >>I have an 88 L98 that run real poorly or not at all. I checked the
ignition,
> >>fuel pressure and injectors and they seem to be fine. I did notice one
big
> >>problem, the vacuum at idle is only 10 in of Hg and at part throttle is
low
> >>too. Any hints on how to find the vacuum leak or other problem that is
> >>causing this?
> >>
> >>Thanks,
> >>
> >>Reponded to clintonlum(at) yahoo.com (take the space out)
> >>
> >>Clinton
> >>
> >
>
> You can also use `propane enrichment` if you don`t have a
> stethescope. As the engine idles, play a stream of propane
> from an unlit torch around mating surfaces and vacuum
> lines/fittings. Listen for a change in idle.
>
> Regards, "Mike"
> -- mikeellison3xxxatzzzyahoo.com --
>
From: "David Johnson" <johnsondr(at)tds.net>
Subject: L98 plenum
Date: Wed, 4 Jan 2006 00:03:42 -0500
Lines: 10
NNTP-Posting-Host: prsstnnas02-pool0-a252.prsstn.tds.net
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Just bought a powder coated plenum. Supposed to have been off a 89. But it
is not. I have removed EGR and smog pump from my 89. The plenum and TB are
diffrent. Is the extra triangular shaped hole between the TB and plenum used
for EGR? If not what is its purpose? Or is it part of the IAC. What will
happen if I simply use my TB on this style plenum? Also the runners are set
up for cold start. I hopefully can use a plug like a expansion plug for a
block if I can find one to fit. If not wher can I buy a blockoff plug.
Thanks
From: <cel(at)nospam.net>
Subject: Re: L98 plenum
Date: Tue, 3 Jan 2006 23:07:04 -0800
Lines: 24
NNTP-Posting-Host: 67.188.156.73
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The plenum seem like the one on my 88 vette that I just gave to my
sister.The cold start should not be an issue it you plug it somehow, Maybe
the 89 gaskets will seal it off. I don`t know what the triangle cutout is
for. I gave all of my repair manual to the new car owner.
cel
"David Johnson" <johnsondr(at)tds.net> wrote in message
news:43bb53a6$1_1(at)newspeer2.tds.net...
> Just bought a powder coated plenum. Supposed to have been off a 89. But it
> is not. I have removed EGR and smog pump from my 89. The plenum and TB are
> diffrent. Is the extra triangular shaped hole between the TB and plenum
used
> for EGR? If not what is its purpose? Or is it part of the IAC. What will
> happen if I simply use my TB on this style plenum? Also the runners are
set
> up for cold start. I hopefully can use a plug like a expansion plug for a
> block if I can find one to fit. If not wher can I buy a blockoff plug.
> Thanks
>
>
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