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Q: Car will not stay running on 2004 Pontiac Bonneville

after the car is driven with no problems. Once car is warmed up and driven for aobut 20 to minutes, then shut off. Problem comes back, starts stahls, chokes out no power stahls. once the car is left to sit for a while it will start and drive again.
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First thing I'd check is the fuel pressure with a test gauge. I think the fuel pump could be failing or the filter could be plugged. If there's any doubt about the fuel pressure and you haven't replaced the fuel filter in recent memory, now's the time for a new filter.
Next possibility is ignition failure, but that should cause the check engine light to illuminate, and you didn't mention that.
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