Q: Losing power

The exhaust leak should be repaired first. Leaking carbon monoxide is bad for your health and could be deadly. In addition, exhaust leaks can cause engine malfunctions, particularly if an O2 sensor is affected. So, you should first have the leak pinpointed and repaired. Once the leak is fixed, if the loss of power problem persists, you can have the engine diagnosed for both loss and power and fluctuating RPMS. Loss of power on acceleration can be due to plugged fuel injectors, faulty oxygen sensors, fuel pump and/or filter, vacuum leaks including that caused by a faulty EGR system, ignition system malfunctions, bad valve timing if the timing belt or chain is worn or skipped, blocked exhaust (e.g., catalytic converter fails or becomes clogged), a faulty airflow sensor or throttle position sensor, and so forth. To pinpoint the exact cause will require an engine loss of power diagnostic. If you request the leak repair and that diagnostic, the certified mechanic will get your car functioning normally and reliably. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.