wavers as if it is blocked somewhere or gets somewhere in the air ?

What is your question?

it shakes as if it is blocked somewhere or gets the air somewhere or does not contact something in it, I have checked gasoline filter injectors , bulb, collectors, pipes never broken and i do not know what to do now i do not know who can cause that slight swelling when is hot the machine does It , please help me .

What makes this problem better or worse?

When engine is hot

How long has your 2002 Jaguar S-Type had this problem?

A few weeks