hey my friend just got a mazda 626 from his uncle. it ran like shit and would always over heat, so he brought it to his other uncles car shop, they swapped engines and now it ran good for 2 days. Now all of a sudden its not even moving till you get the RPMS to like 3-4. and it just plays wit ya, it grabs sometimes, while other times it doesnt grab at all. definately a clutch problem right?

(forgive my newbness.... im 16 and learning! lol)