Clogged catalytic converter now will not start?

2003 DODGE CARAVAN

178,000 MILES • 3.3L • V6 • 2WD • AUTOMATIC

WILLIAM GASH

MEMBER
1 POST

Car gave catalytic converter codes, ran sluggishly, especially uphill, until it wouldn't get over 30 MPH. Tried to get back home but finally quit running. Cut exhaust behind cat and drilled holes through honeycomb. Used exhaust tape to mend the pipe but car won't fire. I'm going to try new plugs today, but as for now won't start.

Mar 12, 2023 at 6:22 AM

STRAILER

✓Experienced Mechanic
55,256 POSTS

Chances are the catalytic material has clogged the exhaust pipe but to be sure we can lose the cat from the exhaust manifold to see if the engine starts. Here is a guide to help with instructions in the images below to show you how:

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.

Check out this guide as well:

https://www.2carpros.com/articles/car-not-running-advanced

Please go over this guide and report back. Check out the images (below).

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Mar 13, 2023 at 2:42 AM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.