EVAP canister help

[romans, mark]

Anybody have an 84 that can answer that?

----- Original Message -----
From: "Louis Baiani" <nepti at nbnet.nb.ca>
To: <gmecm at diy-efi.org>
Sent: Wednesday, June 20, 2001 8:43 PM
Subject: Re: EVAP canister help


> Would an 84 have alot of pressure?
>
> Louis
>
> "romans, mark" wrote:
>
> > My 89 vet has pressure.  Every GM car I have ever looked at (Late model)
> > has pressure.
> > Mark
> > ----- Original Message -----
> > From: "Marteney, Steven J." <smarteney at xlvision.com>
> > To: <gmecm at diy-efi.org>
> > Sent: Wednesday, June 20, 2001 1:08 PM
> > Subject: EVAP canister help
> >
> > > My last two gas station visits have shown that when I remove the gas
cap
> > > from my 89 Formula 350, '165 absolutely NO "sucking" sound is made.
It
> > has
> > > done it before but it was only a quick fizz.  Does the tank run under
a
> > > vacuum, therefore the sucking sounds when you crack the cap?  Does it
take
> > > time for this condition to develop?  (In other words, start car, quick
> > drive
> > > to gas station, shut-off, typically no suck sound?)  Likely a bad gas
cap?
> > > Bad vac line?  Bad canister?
> > >
> > > I know my 87 T/A 305CCC was quite obnoxious when the gas cap was
removed.
> > > I'm wondering if this is the cause of my laxluster gas mileage even
BEFORE
> > > the motor was rebuilt.  Any ideas on how to test?
> > >
> > > Steve
> >
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> > >
> >
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