Question about 2000 Buick LeSabre
When my wifes 2000 LeSabre Custom gets up to about 40, or is crusing around 35 - 45 ( I can't say that it only does this at these speeds, it just seems more common at them), it will sometimes do this hard stutter thing. It just does it one time and may drive fine for a mile and do it again. It's like the engine dies for a split second, it just stops pulling for a split second and then starts back to pulling. Not sure if it's a transmition slip or the engine cutting out. Engine doesn't start to rev up for that split second. If it was a spark plug or a wire, I wouldn't think it would feel like the whole engine shut down. We have no problem starting the car and it never turns off. The check engine light has come on and off some and the auto parts store checked the code and said that the mass air flow sensor was on of the things listed under the code they got. One of the theorys was that the passing gear was slipping, the other was the sensor. Can you ohm out the sensors to see if they are good? I think my wife has said the the car has lurched forward while sitting at a stoplight when this first started but she hasn't said it again.
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