my car hesitate and stalls when I need to stop but starts back up but stalls again when I put it in gear
Common symptom of a vacumn leak. There is a plastic fitting on the top of the intake plenum that is black and shaped like an "H". It will have hoses coming out of all 4 of the ends of the "H" quite often one of the legs of the "H" breaks and leaks a lot of air and this affects the idle of the car.
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