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Starting Problem Theory
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wolfej1
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Joined: August 15, 2005
Posts: 679
Location: North Royalton, Ohio
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PostPosted: Thu Oct 11, 2007 10:54 am    Post subject: Starting Problem Theory Reply with quote

Folks,

Does this seem at all plausible?

Bad thermotime switch which keeps cold start valve injecting longer than the usual 8-10 seconds combined with weak starter resulting in flooded engine condition because cold start valve keeps injecting as long as it takes to start the engine which is longer than normal due to slow starter.

Result - gasoline smell and needing to floor gas pedal in order to start engine - which once it does start idles poorly due to excess gas.

IF the engine happens to start quickly then there is no real issue and the idle is decent and will continue to warm up with no gas pedal assistance at all.

Start shooting me down boys..... Very Happy

Have a pleasant day
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[email protected]
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Joined: June 14, 2002
Posts: 1663
Location: Palominas AZ
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PostPosted: Thu Oct 11, 2007 3:10 pm    Post subject: Reply with quote

Unless its like bellow 30 degrees - the CS valve doesn't fire.

You COULD have a leaky cold start valve though that would leak gas into the manifold while the bus sits - and while it's running.

If you suspect its firing - unplug it for now (electrical) and see if that helps....
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Ryan

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1963 Beetle
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josh
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Joined: July 13, 2003
Posts: 1773
Location: laid back in the tall grass
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PostPosted: Thu Oct 11, 2007 3:50 pm    Post subject: Reply with quote

The engine rarely if ever really needs the cs valve to start.

So to test your theory you could just leave it unplugged.

If the problem dissapears you may be right. If the problem persists probably not.

If you don't know adding a starter relay ala the idiot book or bosch kit may be a cheap & easy fix for the slow starter problem.
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modok wrote:
...If If stoner A takes a hit and then stoner B goes right away(not waiting two seconds), he's trying to suck on it while it's still got a vaccum, doesen't get much of a hit at all! Cause it hasn't filled back up all the way yet.

Stoner A is cylinders #2/4 B is #1/3 The plugged bowl is the throttle, the bong is the manifold
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nick9
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Joined: January 14, 2004
Posts: 79

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PostPosted: Fri Dec 05, 2008 1:01 pm    Post subject: Reply with quote

Just to clarify for anyone reading in the future, the thermotime switch should activate the cold start valve at temps below around 30 degrees CELCIUS. Bosch L-Jet repair manual: The switch (0 280 130 214) should be 0 ohms (closed) below 86 degrees F, and should be infinite ohms (open) above 104 degrees F.
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