This hot start problem is defined in the Bosch FI book (very good reading for
those who want to understand how the FI system works).
It's vapor lock, and VW uses a fan switch to turn on the radiator fan when
the engine compartment temp is above a certain point. So adding a fan to the
Vanagon engine compartment may help cool down  an air-cooled or inline-four
engine. I'm not sure if the WBX needs one.

I remember how I had to pour several cups of cold water on the fuel pump of
my 64 Bus to get it started on hot days after driving. The engine in my 82
isn't effected-probably because the fuel rail is a design that prevents it.
But don't let it run out of gas!
I need to put a switch to my pump to prime the system if I run out of gas. It
takes a long time to prime the system. Perhaps a way to turn on the fuel pump
manually could be used to overcome the vapor lock, instead of cranking the
engine until the battery runs down.
The Golf that the engine came from has a pre-pump. I'd like to figure out
away to prime the system. Are the WBX engines hard to start when hot, or if
you run out of gas?

Robert
1982 Westfalia
Seattle

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