问:抽搐/ studdering问题

我04现代圣达菲表演。我已经寄给了力学思维有失败,但他们说这不万博亚洲客户端是或者火花塞只是所需的燃油系统清洁。我们允许他们“干净”的燃油系统。它停了几周。起初当我把SUV在齿轮跳动。但它不会发生所有的时间。几分钟后将停止和运行很好。这几天内就停止了。,这是几周以来“清洗”和现在的行动甚至在闲置。“混蛋”将有一个很难一次就会闲置罚款。 It hesitates sometimes when driving and even now it will jerk once or twice while driving. And I am only going maybe 45-50mph. And sometimes when pressing the gas it will do this soft jerking thing. I am assuming it is the fuel pump and or filter. But it is inaccessible for my vehicle unless they drop the tank. Any ideas before I pay the money to have this replaced?

我的车有140000英里。
我的车有一个自动变速器。