Depending on the mileage and condition it could be plugged catalytic converters or possibly fuel/air starvation pumps,filters,lines etc or the more complicated things that would require a scan tool and a good mechanic to find like a throttle position sensor or a crank sensor could also cause this!
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Depending on the mileage and condition it could be plugged catalytic converters or possibly fuel/air starvation pumps,filters,lines etc or the more complicated things that would require a scan tool and a good mechanic to find like a throttle position sensor or a crank sensor could also cause this!