Date: Fri, 12 Nov 2004 02:56:45 GMT From: "James Sweet" <jamessweetnospamail.com> Subject: Re: 900 T16 1989 Turbo problems
"Dave Hinz" <DaveHinznospamcop.net> wrote in message news:2vheo5F2lkcbtU1nospamberlin.de... > On Thu, 11 Nov 2004 09:49:40 +0100, Felix Holm <felix.femkenospamet.nl> wrote: > > > > "Dave Hinz" <DaveHinznospamcop.net> wrote in message > > news:2vcrqoF2ka4vuU1nospamberlin.de... > > >> Where does the needle go on the boost valve? Into the red, or just > >> yellow, or white? Is that down from normal? > > > > In boost the needle goes to the end of the yellow zone, not into the red. > > So you're getting only basic boost then, I think. > > >> Unless your turbo is making whiny, grindy noises, yes, it is unlikely > >> to be the turbo itself but rather something telling the pressure to > >> be reduced. > > > No, it's not making any strange noises. > > Good. So mechanically we're sound then, it's just an engine management > problem. > > >> Yes, any number of things can open up the wastegate, making you lose > >> top-end power. Easiest would be something physically rattling in the > >> engine compartment, making the engine management (APC system) think you > >> are having predetonation (ping) and backing off the boost. Do you > >> have any rattles? How about air leaks? did it get worse all of the > >> sudden, > >> or gradually? > > > > The strange thing is that I don't lose top-end power. It's just the power in > > the beginning. > > That's puzzling. > > This car doesn't use a vacuum advance on the ignition does it? I've seen some problems similar to that from sticking advance mechanisms on other cars.
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