Need help with my Catholic Converter....

[Snowdog]

I was hoping some here would know the symptoms of a catalytic converter that's needing replacement. Sorry about this, but it's for my Lumina w/ 3.1L V6. Some pointers for future reference could go towards my FSJ knowledge, so it's not completely OT (besides, I trust this place a heck of a lot more than the repair shops).

Here are some symptoms I'm experiencing:

*Sulfur/rotten egg odors frequently

*engine threatening to die out on idle

*gas milage that's noticably gone south

*clicking and tapping of the exhaust system after I turn the motor off (from excessive heat, I think).

If I in fact do need a new catholic convertible, what kind of harm would come to my engine if I continue to run on one that's nearly plugged?
Found a spot that will install a universal weld-in unit for $159, including labor and tax.

[ February 20, 2003, 07:48 AM: Message edited by: Snowdog ]

[Mikel2]

I think what you need is an exhorcism for the catholic converter (Sorry, I couldn't help it) :D

[ February 20, 2003, 08:10 AM: Message edited by: Mikel2 ]

[Bluesky4x4]

hehe..You need to take the Catholic Converter to Iraq.

[Bluesky4x4]

It definately sounds like you need one. In the end if you don't get it replaced soon, you may not be able to drive to the shop to get the work done. If it gets completely clogged, no workie.

[kidatforty]

It does sound like your catholic perverter does need some exercising. Mormon mufflers have also been known to cause problems as well. The rotten sulfurous stench from below is normal. the tendency to die and poor mileage can be attributed to clogged cat. but don't assume. It is not good to drive with clog. Pull it off and have a looksey.

[mdill]

The converter is a symtom, it maybe gone now but a new one isn't the cure: the cause
is the engine dumping unburned fuel into the exhaust, could be anything from bad
plugs, bad injectors, bad coil .... Have it fixed before thowing money into a cat that
will be toasted in short order.

Mike

[The Anti-Chrysler]

Listen to mdill, an overly rich fuel condition will cause the "rotten egg" smell - it is the converter being overwhelmed beyond its tolerance.

If it otherwise runs good at higher RPM's, check for a stuck-open EGR valve. GM is famous for linear EGR valves that get stuck open with carbon deposits on mid to late 90's vehicles.

If it always runs bad, check for a bad fuel pressure regulator, faulty sensors (MAF, TPS, etc) or a weak ignition system.