Date: Thu, 08 Jun 2000 07:42:52 GMT From: Mathias <_nopsamm> Subject: Re: Valve replacement
The problem with the valve is the same for all Saab turbos, its more or less the same valve: Either the membrane in it brakes (often on tuned cars) or there is dirt in it which makes the valve leak. If you dont know for sure its broken already, remove the valve and test it! Just take a deep breath and try to blow through all in/outlets (one at a time of course) on the valve (two big, one small). It should not be possible. If this test turns out ok you should try to find a solution to your problems elsewhere. vacuum hoses is a good idea.. /M BigFatGuy wrote: > _nopsamm (Mathias) wrote in <393DE3E5.D9561B2nopsamm>: > > Thanks all for the replies! I'm going to try to change the valve out this > weekend. > > My understanding is that this is a common problem with some of the old 900s > and that if this part replacement doesn't work, I should run a check on all > the vacuum hoses. > > Ford > > >The bypass valve is EASY to replace. On my 9000 in took me about 20min, > >and it could have been done faster if necessary. All you need is a > >screwdriver. You may need to plug some hooses for cooling water, but > >this is nothing to worry about. > > > >Morgan, when the bypass valve is leaking, air that has already been > >measured by the air mass meter is released into open air, which makes > >the air/fuel mixture to be all wrong. This is what causes the frequent > >stalling... > > > >Br, > >Mathias > >9000 Aero -91 > > > > > > > >Morgan Bullard wrote: > > > >> If you can figure out which part it is, (it should look like the new > >> one, :) ) it shouldn't take more than a few minutes. I don't know how > >> that would cause your car to stall though, unless it is causing a > >> vacumm leak. What it does it allow the compressed air from your turbo > >> someplace to go when you close the throttle while under boost. It > >> keeps your boost up and prevent large pressure build ups on the > >> impeller of your turbo, which can damage it. > >> > >> "BigFatGuy" <BigFatGuynopsameja.com> wrote in message > >> news:8F4B94BC6BigFatGuymydejacomnopsam126.101.100... > >> > Hello all. > >> > > >> > I've recently been advised that in order to stop the frequent > >> > stalling of my 1992 900 Turbo Convertible, I should replace its > >> > turbo bypass valve. Has anyone had any experience with this > >> > procedure? Is this something I can do myself in the driveway or > >> > should I approach my mechanic? > >> > > >> > Thanks, > >> > > >> > Ford > > > >
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