Prius running without catalytic converter assembly

My Prius could barely make it up a hill, and kept making that metal on metal slapping sound. The mechanic disconnected the catalytic converter so I could drive it to the dealership, and that was the worst, due to the super loud noise it made all the way there. The power still wasn’t great, but at least better than when the cc was connected.

I read about position rings wearing down and blow by clogging the CC with high mileage (I’m at 148,000 and change) but can someone explain why the power still wasn’t that good without the cc attached?

 

Yes its’s there, just not connected.

I’m not sure exactly but more than the average amount because I’m constantly having to add more every 10-14 days. Do you know why the acceleration power might be lagging even without the connection of the long metal type part that contains the CC assembly?

 

You know your right. I wasn’t pushing down as hard as I could because every time I do it gets louder. It may well have been subconscious.

The crazy thing about this scenario is that this will be my 3rd Catalytic converter replacement in two years.

I don’t believe they ever fixed the underlying problem, which I believe to be the blow by from the piston rings wearing down. The PCV valve is really low as well and that doesn’t help.

I'm hoping the Toyota dealership honers the warranty for a third time, and then it’s on to install a quality OCC.

In California if the car is under 150,000 miles, their supposed to replace the converter at no cost. It’s crazy cause I’m right on the cusp of still beOmg eligible for the warranty, which is the only good thing about all this.

Can you check my last post, and answer if you’re qualified. Thanks

 

Do you or anybody have any thoughts on the OCC???

I’m hoping if the dealership honers the warranty, that the OCC will prevent the new converter from crapping out.

What’s really frustrating is the second time the converter was replaced you would think the Toyota dealership would have some sort theory on why it’s going bad so fast, but it’s almost like as long as they can charge me for additional regular maintenance that they can actually charge for, they’re not concerned.

What are Thoughts on oil catch can as remedy to
my quickly deteriorating converters?.... Had two in the last two years... hopefully gonna get a third.

 

Are you sure?


With high mileage the piston rings wear down and get gunked up , which produces blow by, which results in increased pressure in the crank case, and that pushes the burned oil from the pcv into the engine.


This catch can won't stop oil use, but will catch a lot of it from burning in the engine, helping save the cat.

I’m surprised they didn’t have a solution second time round. What would you recommend??

 

Could you explain why it’s the converter that’s always going please?

 

Just regular. Probably 40 miles a day. I’m trying to figure out why the caddy keeps going on the blink?

 

Forget the acceleration. I think that was just subconscious. I’m talking about the Cady, I’m at the end of second one in four years.