What is wrong with my car? - 2

I have a 2000 Ford Mustang but normally runs fine the other daymy husband took it for one over to his friends house and came back and it was finebut then when he went to leave for work two hours laterwhen he started the car it was shaking really bad and it shakes really bad when you put it in drive and it will shake up until you get over probably I think 10 miles per hour and then it stopped shaking but when you are sitting still it starts shaking again what would cause this

Check the air filter. I think part of the intake is dislodged.

As cliche as it sounds, check spark plugs. I blew my first cylinder spark plug and it gave me problems anywhere from idle to between 20-30 mph.

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