Subject:
L98 plenum

From: "David Johnson" <johnsondr(at)tds.net>

Subject: L98 plenum

Date: Wed, 4 Jan 2006 00:03:42 -0500

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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

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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

>

>

From: "DAVE GEE" <alfansu-xnospamx-(at)gci-net.com>

Subject: l98 strange behavior

Date: Fri, 27 Jun 2003 21:58:20 -0700

Lines: 19

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Hi group:

I have an 88 conv. that is suddenly running strange, starts

right up and runs at about 900rpm for about 2 secs. then

dies. It will do this a couple of times, then it will start and

run at around 6 to 900 rpm (hunts) with a problem taking

any throttle until about 1/3 throttle, then will take off.

as it warms up the problem seems to get a little better but

it is never right, with a flat spot at small throttle openings.

No light or codes associated with this, thinking maybe

coil (there are occasional backfires when trying to give it

more throttle).

Any thoughts on diagnosis or similar problems greatly

appreciated!

TIA Dave G.

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