[Shotimes] Stalling when very hot outside

[clubairth@bellsouth.net]

Fuel pump is weak. I like this guy for the 190 LPH pump.
http://www.autoperformanceengineering.com/
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> Hello, This is my first post to the group.  My 93 SHO
> MTX generally runs very well. However the 4-5 times
> per year the temperature exceeds 95 degrees the SHO
> will stall and then it will have to cool 15-20 minutes
> before it will restart.  Then when
> it gets hot again it will stall again. 
> 
> I ran the codes and they were:  172, 176, 556, 557,
> 542.  
> 
> Has anyone experienced this type of problem that only
> happens in extreme heat?  Any input you could pass on
> would be greatly appreciated. 
> 
> Thanks. 
> 
> Mike