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Date: 11 Nov 2004 19:19:37 GMT
From: Dave Hinz <DaveHinznospamcop.net>
Subject: Re: 900 T16 1989 Turbo problems


On Thu, 11 Nov 2004 19:59:40 +0100, Felix Holm <felix.femkenospamet.nl> wrote: > Hello, > >>>> 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. > > This is what it always did. So there has nothing changed. That may also be a problem, but maybe not related. > It feels like some valve/sensor is blocking the boost at low revs. > It also feels like it accelerates with little, hardly noticable, hickups. > Like if a regulator is gradually allowing more boost as the revs go up. > Difficult to explain in a foreign language :-) (I'm Dutch) No, your English is just fine, no problems there at all getting your point across. If you hadn't said something, I wouldn't have noticed. >>> I lost my power all of a sudden, not gradually. >>> Strange thing is that it came back sometimes after I turned the TPS a >>> little >>> bit. But that lasted no longer than a week. >> >> What's a TPS in this context, please? > > Throttle position sensor. Is that just a wide-open throttle switch, or what does the '89 have? > The switch that tells how far the throttle valve is open. Right. This will give you extra fuel, and a few other things change, when the throttle is wide open. You should not have that switch activated except near and at wide-open. >> I wonder if your AMM's internal adjustable resister is the next thing >> to check. Do you have an ohmmeter? Anyone else want to jump in here, >> I'm not getting a good picture of it yet. > > What is the AMM ???? > Air Mass Meter???? Yes. There is an adjustment (potentiometer) behind the round brass plug (about 8mm in diameter). There are two pins on the connector which are across the bridge circuit in question, I don't recall which pins, I don't recall the resistance it should be, and I lent that particular manual out to someone who has chosen not to return it. > I have an ohmmeter. > Tell me where and what to mesure please. It's a long shot, but worth trying. By any chance, does it get better or worse in cold weather? The colder the weather, the more likely you are to run into this problem. Dave Hinz

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