Posted for "Larry Klaas" <LDK@bendcable.com>:

 I had the same experience on hot days with hot fuel.  The warmer the weather
 the worse it was.  I attributed it to vapor lock as the atmospheric pressure
 went down at altitude while the fuel was still warm.  It only happened on
 that first tank switch.  One time leaving Vegas at 115* it really burped
 badly and the only way I could keep the engine running was high boost.
 After about 30 seconds it settled down.  In winter I had no problem.
 
 
 
 Larry Klaas
 
 2625 NW Ordway Ave
 
 Bend, OR 97701-5497
 
 Tel: 541-388-2420  Fax: 413-581-0178
 
 Email:  <mailto:LDK@bendcable.com> LDK@bendcable.com