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Date: Sun, 18 May 2003 21:06:43 +0200
From: "Johan Beikes" <j.beikesnopsamdoo.nl>
Subject: Re: Auxiliary Air Valve Questions


Hi paul, As said earlier, depending on temp of the switch, the injector will be activated longer or shorter, or not at all (over 45 C). Indeed, above about 45 C, the switch should be open. It can't be repaired, as it is not merely a sender; it actually controls the duration of the coldstart injection. My 900 T8 also has a defective thermo time switch. I didn't bother to replace it (yet). I have simply disconnected the switch. In these weather conditions, it is not a real problem. It starts getting serious again in fall, where temperatures will drop to 5 - 10 C. Succes, Johan "Paul Halliday" <pjghnopsamyonder.co.uk> wrote in message news:BAED3C1D.63DA%pjghnopsamyonder.co.uk... > in article 3ec415be$0$45391$1b62eedfnopsam.wanadoo.nl, Johan Beikes at > j.beikesnopsamdoo.nl wrote on 15/05/2003 23:28: > > > From your decription of the auxiliary air valve, it should be fine, but make > > sure it is completely closed after 5 - 8 minutes warming up. > > > > I would certainly take a look at the thermo time switch (mounted in front of > > the thermostat housing). Depending of engine temp, this device controls the > > number of seconds that the cold start injector will be activated. If > > defective (short circuit) you may be suffering from flooding the engine. > > That would explain why the car fires up nicely after 12+ hrs of cooling > > down, but not after 5 -6 hrs (and less probably). > > > Try to start the car with disconnected time switch, when the engine has not > > yet cooled down completely and see if there is any difference. > > Thanks Johan, > > This makes perfect sense. I have, come to think of it, had the occasional > stalling from warm starts where the temperature gauge is only just in the > green when firing up. Obviously, the car warms up more quickly than from a 6 > hour rest and the problem was not so apparent. > > From a 5-6 hour rest, it does feel very much like flooding. Am I right in > thinking that no current should pass through the contacts while the car is > being fired up and that the injector is activated by this switch until the > engine has reach 45 deg C? What are the remedies - replacement of the > switch, or can it be repaired? Surely, it is just a thermo-sender. > > Paul >

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