Clicking noise after new catalytic converter

Got my catalytic converter stolen. Mechanic replaced it. Not long after, check engine light comes on, obd2 says cylinder 1 misfire, replace plugs and coils, check engine light clears. Now, I get a clicking noise from the engine area (this might have occurred earlier but I just noticed it). I think it comes from the engine but my hearing sucks. Happens at low speed, coasting around 5-20mph and usually uphill. And feels like the engine is stalling a bit. MPG is down to about 30MPG. A quick discussion with the mechanic, he said maybe it’s the catalytic converter seal. I am to see the mechanic at the end of the week, but thought I’d get some input from you. All of the other posts about clicking noises don’t seem similar. Thanks!!

Mike

 

Yup, 180k miles. I’m bracing my pocketbook. But the end result might be to buy a new Prius. Thanks.

Mike

 

I will see what I can find. I already looked from under the hood and found nothing loose but will check again. I’ll crawl under the car next week. I’m hoping you are right. Thanks.

Mike

 

My insurance covered the replacement of the catalytic converter and required to replace it with an OEM catalytic converter )I don’t know if that’s true with other parts). Thus was actually a longer story because the mechanic said the catalytic converters were on back order and could be 5-6 months before they arrived. Yikes! Luckily, one arrived the next day.

I hope it has something to do with catalytic converter so that I don’t have to pay for it.

Mike