Why sudden hesitation and really poor gas mileage

Asked by Sandra Mar 07, 2013 at 07:21 AM about the 2001 Buick Century Custom Sedan FWD

Question type: Maintenance & Repair

It is driven in mountain terrain and
dusty conditions. Only got approx. 40
miles out if a quarter tank of gas.
Heavy Hesitation when accelerating

3 Answers
177,695

tenspeed answered 11 years ago

It won't be anything that wears out if the problem started suddenly. Most likely a sensor that failed. -- It's a 2001 car so it has around 150,000 miles. A likely suspect would be a O2 sensor. If there is a CEL, get the codes read at the parts store.

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61,265

Andrew answered 11 years ago

fuel filter, maybe but I'd think ignition or sensors as tenspeed said. Getting the codes read would take alot of guess work out.

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