So, this means, that the Thermo time switch measures ambient temp. and
activates accordingly.  Is that right?  I have tried to measure voltage and
see if the test light comes up when cranking, as the Bentley says.  I guess,
there should be some voltage that would activate a little light bulb in my
tester, and would dim after a few seconds.
Is there any other way to test the TTS?  Maybe with Ohm meter?  Or
continuity tester?
Zoltan

----- Original Message -----
From: "Old Volks Home" <oldvolkshome@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, May 03, 2010 10:18 PM
Subject: Re: Starts day, won't at night ...

> To elaborate on Dennis' comment, sounds like the Thermotime Switch has
> gone
> bad.  In cold weather (nights, mornings) under a certain ambient
> temperature
> (Bentley shows this and how to test one), it activates the cold start
> valve
> during the start cycle to richen the mixture.  The cold start valve is
> told
> to shut off by the ECU when the engine fires up.
>
> Temp I or II have nothing to do with the Cold Start circuit.
> --
> Jim Thompson
> 84 GL 1.9 "Gloria"
> 84 Westfalia 2.1 "Ole Putt"
> 72 411 Station Wagon "Pug"
> 75 914 1.8 (No Name Yet)
> Full Timing Since March 1999
> oldvolkshome@gmail.com
> http://www.oldvolkshome.com
> ***********************************
> On Mon, May 3, 2010 at 9:56 PM, Dennis Haynes
> <d23haynes57@hotmail.com>wrote:
>
>> The air cooled engines have separate cold start injector which is
>> controlled
>> by the thermo-time switch.
>>
>> Dennis
>>
>> -----Original Message-----
>> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
>> Of
>> Zoltan
>> Sent: Friday, April 30, 2010 6:07 PM
>> To: vanagon@GERRY.VANAGON.COM
>> Subject: Starts day, won't at night ...
>>
>> As the headline says.  This is a 1982 air-cooled van.  Daytime, when it's
>> a
>> little warmer, it starts right away.  But somehow at night or early
>> morning,
>> when it's a little colder, it won't.
>> I know, there are two temp. sensors and usually the temp. II sensor is
>> the
>> one I would change.  I just haven't experienced this kind of behavior.
>> Maybe none of you would know and send me a message about it, and I will
>> go
>> out and buy a Temp. II sensor and see if it works.  But what if the Temp.
>> I
>> (one) sensor is the one that is not working as it should?  I never heard
>> of
>> that to be changed.
>> My respects to the List.
>> Zoltan
>>