问:我的车犹豫&口吃艰苦的黑烟尾气

引擎灯亮。它在访问一些业余机械商店。我的车就在上周开始上坡的权力问题。我还注意到这是汽车转向第二齿轮。这种转变并不是粗糙但当它改变齿轮非常缓慢。和它最终开始犹豫但不是那么多。现在的汽车是非常缓慢的上坡,明显的和频繁的犹豫。最糟糕的是当汽车已经运行或热。早上的车不是100%而是恶化当你开车。我也注意到带黑色的烟出来的废气。 The black exhaust is not coming out all the time. It comes out right after when the car experiences the difficulty trying to go uphill or shift in gears. I've replaced: spark plugs, sp-wires, d-cap rotor, cleaned the d-cap, new MAF, IAC, O2 sensor. *distributor cap does have a lot oil built up underneath it where there is a metal tray. Fuel filter-new

诊断读者不会对这辆车的工作