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

asked by on January 07, 2018

Catalyct converter is clogged computer at auto parts said we put cleaner in fuel drove couple hours then it just stopped will start and everything but will not go anywhere in gear

My car has 150000 miles.
My car has an automatic transmission.

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.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Won't start. Replaced starter and relay switch, still won't start. Tested battery and it's good.

Hey there, thank you for asking about your 2001 Nissan Pathfinder. You should check fuse number 18 in the fuse panel under the dash. Test the black and yellow wire at the start interrupt relay to see if it gets...

How do you check the engine oil?

Checking the level of oil in the engine is a critical part of general maintenance and something that you should do regularly (with every fill-up, ideally). Here’s how to do it the right way: Park so the car is...

Idling issues

Hi There, It sounds like you may have a dirty or failing idle air control valve causing your engine idle to fluctuate and eventually stall. The idle air control valve is a small valve on the engine's intake system that...

Related articles

2012 Nissan Altima vs. 2012 Volkswagen Passat: Which One Should I Buy?
Sedans are a special class of vehicle: created to provide a comfortable and often luxurious ride to those who have passed beyond the need to stick to the compact class. These slightly larger vehicles offer options the compacts and subcompacts...
How to Get Nissan Dealership Certified
Nissan dealerships offer auto technician jobs to those certified through Nissan’s Service Career Opportunities for Professional Enhancement program.
The Best Used Cars to Buy If You’re an Electrician
As As an electrician, you have to haul around wiring, tools and equipment, and tons of supplies. You can’t get by with a small used car, or even a big one. What you probably need is a good used cargo...