[T3] Cold Starting Problem

[Jim Adney]

On 23 Dec 2010 at 9:52, Bob Rogers wrote:

> The fuel pump is a newly re-build.  The fuel pressure was originally
> steady at 31psi.  I thought that top limit might be causing the engine
> to flood in cold temperatures so I adjusted it to 28lbs. Cold starting
> problems occur at any temperature under 50 degrees.  Average high
> temperature here in Kansas this time of the year is about 30 degrees. 

Try simply unplugging the cold start valve. It may be giving you too 
much fuel on startup. The temp switch that enables has a trip point 
that varies with the year, and I don't recally, off hand, what that 
temp is for a '73.

Your symptoms don't actually sound like it's flooding. If that was 
the case, it should only get worse the more times you try to get it 
to start. I'm not sure, but I get the impression that the pressure 
was tweaked at the factory from '70-on, to meet some emissions spec. 
The pressure is spec'd at 28 psi for 68-9, but for the later years 
they just give a range, which includes 31 psi. That may actually be 
the best pressure for your car.

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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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