问：汽车运行良好，但不会超过45英里 /小时，直到我不得不更换传输线，检查发动机的灯就不错了

检查传输中的流体水平，因为低流体将导致各种传输故障。您描述的问题可能是传输问题或引擎问题，有时是两者的组合。If you can continue to increase engine speed once you reach 45 MPH but the vehicle won’t actually go faster than 45 MPH, there could be a hydraulic fault in the transmission, a low transmission fluid level, slipping bands or clutches, a torque converter defect and so forth. As far as the engine, inadequate acceleration, or loss of power, can be due to throttle body faults (electronic throttle controls, mass airflow sensor, torn air intake hose), worn out spark plugs, faulty fuel pump or restricted fuel system, and large vacuum leaks (including EGR malfunctions, PCV system, leaking intake manifold, leaking EVAP purge valve). In your circumstance, if your vehicle is 1996 model year or newer, a scan tool would be used to look at real time conditions within the engine (e.g., fuel trim, MAF sensor and TPS sensor outputs, etc.) and identify the root cause. If you want these diagnostic tests performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request a功率检查/诊断的损失响应认证的机械师将为您解决这一问题。如果您有进一步的疑问或疑虑，请随时重新连接您的机电，因为我们一直在这里为您提供帮助。万博体育入口