The thing is that I just bought it. And it was acting up when I test drove it but not this bad. Then I drove it home for one and a half hour and than things got worse. But I don't exactly know how this car was supposed to sound. Either way I will take it a shop and do a back pressure test on it.

Even though the people before didn't take good care of the car, with 115k miles I still have a lot of fair in this engine. But I was aware that I was gambling my money when I bought it. $4k for the car.

Will keep updated.