Hi all,
First of all, yes, I have searched the archives regarding this problem.  I
have found some good advice, but nothing that has worked.

In cold weather I have trouble starting the Westy.  The only way it will
start is to floor the accelerator and hold it there (taken from an archive
suggestion; it works). Once it starts, it chugs for a while, maybe five
seconds of so.  Meanwhile, I'm still holding down the accelerator.  Then
something seems to kick in and the engine races. At that time, of course, I
let off the accelerator and everything is fine, though the engine still runs
a little rough.  Once I start it in the morning, it's easy to start later in
the day.  It is as if a valve is sticking, and once it breaks free,
everthing is fine.

I've replaced the rotor, distributor cap, and spark plug wires (they were
due anyway).  I know others have had this problem.  One person had to
replace the computer (please say it ain't this).  Another person suggested a
vacuum leak.  Any other ideas from you folks?  Responses are greatly
appreciated.

Cheers,
John