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Q: truck wont run for more than 15 min if it is warmer than 70 degrees on 1997 Chevrolet 1500 Pickup

Had changed the fuel pump at one time but still have the problem. runs great in the cold never dies. But in the warm weather it wont run for long. let it cool down and it starts right up.
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sounds like vaper lock try covering the fuel filter with alumminum foil. This sometimes keeps the filter cool.
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