Q: Car self-accelerates intermittently

我购买了一辆二手车和三个不同的时间（一个月内）我的汽车自加工了。每次这样做之后，都有微弱的油味。这辆车已经坐了1½年，在我购买之前，进行了完整的调整。还进行了换油并更换了以下机油：空气过滤器，消音器支架和前制动垫。购买（用过）两周后，就开始了问题。当我按下刹车踏板时，刹车放慢脚步，汽车一直在移动。所以我在制动踏板上有些猛烈抨击。紧随其后的是，淡淡的油气味。两个星期后，同样的事情也发生了。然后，今天，我的汽车在离开停车场时自行加油。 This time, I did not use the brakes before the self-acceleration. Now… my brakes are squeaking. When the self-acceleration happens, it is always when below 10 mph. The brake light, ETS, oil check light, and check engine lights do not come on. No lights have ever come on. What do you think is causing the self-acceleration and what will solve it?