Plugged cat

There's that cat declogging shit you put in a tank of gas. Made a CEL for the cat disappear for my coworker. Stuff makes your exhaust smell like shit but it works.

>It's illegal to sell used cats
Still lots of them out there. Some mexicans were spotted in my city's community center parking lot stripping cats from under certain SUV vehicles. I guess the cats get sold to the body repair or other repair shops. In my city, a lot of those shops are owned and run by mexicans. You can get airbag and cat replacements at those body shops a bit cheaper....

Take off your muffler and redline the car until it blows the honeycomb out the back in fragments

>but you have to go somewhere shady to get a straightpipe put on

Unless your shit is rusted and needs a torch or Dremel to get off, or the cat is built into the header, then it's ridiculously easy to put on yourself - 4 to 6 bolts. Though, I realize not everyone lives in a spot where they can work on their car.

If it's a 'tuner' shitbox you can even get resonated test pipes for like $60 on ebay - they look like cats (mine is on the right in pic) so you could get any shop to do it. They sound good too.

Check your state laws. in WA state cars built after 2010 dont have to do emmissions so u can straight pioe that summbitch

>Car stalls like once a month?

Increase throttle and reduce angle of attack damnit

>so u can straight pioe that summbitch
That also means you cannot take the car to any place that can see the cat has been removed AND which might report you. WA State law does require shops to report certain things. For example, if a shop notices odometer fraud, it must report.

If I ran an oil change shop, I would take pictures of the car and then report the cat has been replaced by a pipe and the picture of the O2 sensor would probably show something strange. Breaking the law is breaking the law.

I wish. My car as a throttle position sensor. Tried a new one, but no matter where I set it, after 5 minutes of driving my idle drops to 500 rpm.

He didn't get it

Either punch out cat or go to a wreckers and get a used cat off a car with a bigger engine.

Try some Cataclean aka paint thinner. It might work for a month or two. Otherwise you gotta take the cat off and clean it or gut it.

>it still failed in only 1 year.
That's because it was probably a chinese counterfeit. Even good chinese brands have multiple other chinese counterfeiters copying their product.

a clogged cat is a bad thing. it'll kill your mpg because the engine will always run in open loop. what car? what code? p0420? buy an oem one if it's a decent car and/or you're gonna keep it a long time. get a cheap one if it's a beat up shitbox.

>he hasn't removed the cat yet
Pleb

>Are catalytic converter cleaners a meme?
Never heard of flushing cats with paint thinner to clean them as being a legit repair method. If it worked for someone, then he's one of those rare odd situation.

If you're going to remove the cat to clean it, you might as well just replace the cat. Used cats, especially stolen ones, become replacement parts at many small shops, but in my state, you're supposed to have new ones installed. Due to the consumer protection law that requires a shop to return your replaced bad parts to you, you can get your bad cat back. A shop cannot charge extra to return parts and the advertised price is the price with the parts returned to you. That prevents the shops from scamming the law by automatically saying all prices are where we keep all parts. Since your cat is bad, there is no scam. But some shops like to say "your cat is bad" and they might give you a used cat salvaged from other customers if it fits your car. So keeping the allegedly bad cat (that was actually still good) can stop them from reselling your used cat to someone else.