Vapor Lock?

[scott miller]

This month I've had gradually worsening trouble with hot starts.  When the 
engine is hot, it won't fire without starter fluid.  Lately, even with 
starter fluid, I get ether ignition, but then it dies.  About 45 minutes 
with the hood up and it starts instantly.  It's acting like vapor lock.  I 
think my after-run blower is intermittent, but I've heard a lot of them 
don't work and don't cause this.  My local mechanic thinks it might be the 
check valve on the fuel pump, which I replaced about 30k ago.  Injectors 
have 100k on them.  I've had no problems idling hot, just when I shut it off 
for a few minutes.  Is it possible the fuel in the line is boiling because 
the  pressure drops?  Can I check this by jumpering the fuel pump before 
starting hot?  My mechanic suggests pinching the fuel hose at the pump 
closed at shutdown, then trying a hot start after a few minutes to see if 
it’s the check valve.  Any thoughts/suggestions?  This car runs almost 
exclusively on the expressways, so I can actually live with this for a 
while.
Thanks,

Scott Miller
’90 200tqw
4-week old baby
teenage driver
yikes

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