catalytic converter

[SultanGris]

I believe that im having catalytic converter issues, i think its breaking apart inside, and rattling around, as i hear it rattle, and heat shields are not loose, so its inside, also seem to be having some power issues, possibly caused by partial blockage of exhaust system.

due to a repair cost of around 500$, that i currently dont have to spend, what would happen if i clean out all the crap that is loose inside the cat, would the lack of a cat cause any issues with the engine, or is it purely environmental?

[muzzy1maniac]

Why is it a $500 repair? GEt a new cat off Ebay for $50, cut the old one out and bolt up the new one. Or you can have a shop or buddy weld it in.

[biv343]

If it's an OBD-2 vehicle, you'll have problems, as there is an oxygen sensor before and after the conveter.

I bought a direct bolt in converter, unbolted the old one, bolted in the new one. Cost $150. Plus some beer.

[s10blazerman4x4]

I don't think the problems will be thier on OBD2 if you do it right. My friend hollowed his out on his 97 sonoma and there is no code their.HE has 4 O2 sensors//Just a thought

[biv343]

I thought if the ECM saw a difference in O2 levels between the sensors that it would throw a code. Never tried it myself. Maybe I assumed incorrectly.

[dmbrisket 51]

you should (on obdII) get a rich code at the post cat o2 (it doesnt say rich, it says 'cat effishincy failure' and this can make you run lean

[s10blazerman4x4]

Originally Posted by dmbrisket 51

you should (on obdII) get a rich code at the post cat o2 (it doesnt say rich, it says 'cat effishincy failure' and this can make you run lean

Well thats what i thought but after he did it there was no code. Go figure.

[JoulesWinfield]

Are you having a power loss at highway speeds or from the get go?
From what I was told is that you would see high speed torque loss.

Either way I havent had a Cat for several months. The only time I have seen the check engine light is when I first turn on the key.

I noticed a huge difference in the sound and of course she breaths a little eaiser without the cherry red 100 pounder hanging under the passengers seat.

[dmbrisket 51]

aftermarket cats can set a code to for not being good enough

[s10blazerman4x4]

True/ Should check to see what max engine size is on it.

[matt rock]

Originally Posted by JoulesWinfield

Are you having a power loss at highway speeds or from the get go?
From what I was told is that you would see high speed torque loss.

That's the problem I'm having right now.
I' replaced all the sensors, wires, plugs, fuel pump/filter.
And it takes me 30 seconds to get up to 55 right from the get go
in the morning. And warming up, it takes nearly 15 seconds
to get up there. I haven't a clue. If my mechanic can't figure it
out after coding and replacing, how am I?

My mechanic replaced my engine early last year, and all of the
maintenance I've had since. They're good. But I
am getting really concerned. The codes aren't getting me
piece of mind.

[JoulesWinfield]

I would find someone willing to put a pipe in its place.
Just make sure they leave the part of the cat pipe where the o2 sensor threads in. They can just weld in front of it.

If it doesnt fix the problem no loss. If it creates more problems, just weld it back on. If nothing else your 1/4 mile time will be a 10th faster without it.

[dmbrisket 51]

that will throw a light and lean the moter out

[JoulesWinfield]

Originally Posted by dmbrisket 51

that will throw a light and lean the moter out

Mine does not.

[dmbrisket 51]

what year is yours? if its obdI it wont