I'm experiencing some difficulties re-starting the engine on my 87 syncro after it has been driven awhile and shut off for a brief period (up to 15 minutes).  I'm thinking that a have a bad temp. sensor (I or II?) but haven't had the chance to test it yet.  Seems like a bad temp sensor would result in a rich mixture at start-up when it is no longer needed (since the engine is already warm).  The only way to get it to start is to leave it alone for at least 15 minutes or step on the throttle (and this only barely works part of the time) thereby increasing the air:fuel ratio if my thinking is correct.  Any thoughts would be greatly appreciated.

Tom Runyon
Sierra Vista, AZ
87 syncro
85 Westy undergoing renovation