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check your fuel pressure at the rail. the regulator may be going bad. * turn key to on but not running. check for pressure. fuel pressure should hold for about 1-2 min at the rail before it bleads down. if you have an inital blast of pressure and then it is gone in 10-20 seconds change the regulator.

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Q: Your 1991 Buick lesabre hard to start after sitting all night must hold accelerator down while cranking then runs fine all day you checked the valve after sitting all night no fuel till cranking?
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