I think this is low manifold vacuum try backing off the valve adjustment and
see if that helps
http://www.bostonengine.com/articles/hydraulicll.htm

Bob

----- Original Message -----
From: "Paul Guzyk" <paullist@GUZYK.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, July 11, 2006 12:03 AM
Subject: Re: 1.9 won't start when hot outside

> sorry, I talked to too many people this week.
>
> The problem is not with a Syncro, it's with a 1.9 engine in an 84.
>
> what's interesting is that he can push start it.
>
> -Paul
>
>>
>>-------
>>Three times now the van has not started in hot weather. Two were
>>fresh starts and the engine cold. It turns over but doesn't fire.
>>There is spark and the distributor is fine. The battery is new. Once
>>in Osoyoos (Hot weather) I stopped for gas and the same thing would
>>not start. I push started it no problem. Then was able to drive all
>>the way to Kimberly. I can hear the pump build up pressure and then
>>stop. It just doesn't fire.
>