check valves

[Brian Hicks]

To whom it may concern;
   I own a 1992 Chevrolet S-10 Blazer with a 4.3W Vortec engine.  Lately, 
this vehicle has become hard to crank after the engine has had a few hours 
to cool off.  The engine turns good but doesn't seem to be getting fuel.  
After the initial start the engine will restart with no problems.  I am 
curious if you can tell me if there are check valves in the injectors that 
would allow the fuel to seep back out of the engine over time.  If there are 
no check valves, could you please give me some suggestions as to what the 
problem may be.  Your expertise advise would be greatly appreciated.

Sincerely,
William R. Hicks
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