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Date: Wed, 14 Nov 2001 22:49:14 -0000
From: "Richard Henwood" <>
Subject: Re: Compression Pressure Carlson Turbo.

I have had a look and don't seem to be able to find a dashpot. Mine is a turbo model, and I don't think it was fitted to these. However, behind the manifold, on the bulkhead there is a small cylindrical unit, which has some vacuum pipes coming from it, one leads to the throttle housing, one to a long black unit which runs the length of the inlet manifold just above and in front of it, and a third which seems to be cut / disconnected. Any ideas what this is, or if it could have anything to do with it? Richard <> wrote in message news:3bf2abcd$0$43566$ > Richard Henwood <> pressed random keys until the following was produced: > > Well, funny you should ask. > > > I just go the car, and had to replace the exhaust as it was blowing really > > bad. It also stalled when you came down from medium / high revs. I put > > this down to the exhaust blowing. However after changing the middle box > > section, it still does it (less often now). So I wanted to see if there was > > something more. I was also getting a large amount of white smoke coming > > from the tailpipe, but I have narrowed that down to over filling with oil > > (which I have now drained off). > > > I still cant sort out this stalling though!!! > > So, when you're letting off the pedal, it stalls right then? Check your > dashpot - if you look at the throttle mechanism, where the cable goes > to the throttle on the intake? There's a canister & plunger there > (pancake looking thing) that is supposed to stop the throttle plate from > closing too quickly. When you open the throttle by hand, then let it > go closed by spring pressure, there's a spec (3 seconds or so, it seems > to me, but I'm possibly wrong) of how long that thing will take to slowly > compress to the point where the throttle closes completely. > > On my car (an '88 900 turbo) there's a microswitch which closes when the > throttle plate is completely closed; I can hear a "click" from it, which > tells me when that has happened. > > Take a look; perhaps your dashpot is shot, and the throttle is closing > too quickly. Even if that's not *this* problem, it could be related, > and it's certainly easy enough & cheap enough to replace. If it's not > causing this problem, it's causing higher emissions if nothing else, > by being bad. > > Take a look & let us know either way - you've got me curious now... > > Dave Hinz >

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