Catalyst Converter Problem....

[HUM GOOD]

my cat sound like ti is breaking apart.

Has anyone had this issue....I'm over 100,000 so the warranty is void.
Can I cut them out, empty and put them back in?

any ideas?

I don't really wanna fit the bill for new cats....

Thanks Joe

[pdsq99f4]

They can do that sometimes. Usually the air filter is clogged too. It's not really legal to empty them out and your check engine light will always be on.

[Rene S. Nielsen]

Hi

I just did this to mine since they both colapsed (funny spelling). You don't even have to pull them from the car to do it.

Just crawl under and unmount the protection cage. Then you will have plenty of room to make a hole in the cat, open it up, empty it out and weld it back together.

Just remember to put someairway protection on because the inside of the cat will not taste very good, and I would imagine that it's not very healthy either.

Regards
Rene

[HUM GOOD]

hey Rene - how does the truck run with them empty?

as pd mentioned - does the check engine light stay on?

how large of a hole worked?

[HUMTECH]

You can but o2 sensor cheaters to install after the cat which will tell the pcm everything is normal. If you need to pass a smog test you will fail though. I put them on my 98 Z71 pickup and they work great. Not positive if they are avail for the Hummer, but def worth it. With an open cat it will think your running rich and the pcm will pull fuel trying to correct, or unplug the post sensor and it will run in open loop

[IRA51]

gutting the cats and useing Sims to repace the down stream O2s works great ,if you don't mind breaking the fedral law on cat tampering/removal. getting new high flow cat's is a far better idea.