Q: Catalyct converter is clogged, we put cleaner in gas tank as told after driving it about 2 hours it just stopped. Won't go anywher

There are no fuel system cleaners or additives that will unclog, or restore, a catalytic converter. Although a scan tool can reveal some data about converter operating conditions there are other tests that must be performed to determine if the converter is truly clogged and these tests are not performed at auto parts stores. There are many causes of loss of power that have nothing to do with the converter. 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 in your circumstances will require an engine loss of power diagnostic. If you request that diagnostic, the certified mechanic will pinpoint the problem and get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.