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Clogged fuel filter, clogged air filter, maybe the mass air flow sensor located in the air intake duct. ( take it to o'Reilly's or to a garage and put a diagnostic computer on it to see what fail codes come up. Mass air flow sensor will give a fail code.) Weak fuel pump?

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Q: Oldsmobile intrigue 1999 with a 3.8 liter motor hesitates 45 -50 miles per hour help?
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