Catalytic Converter (Cali VS. FED) Options

[barterj]

I need a new front Catalytic converter for my car. Its a 2.2L and is cali. emissions. Is there any difference in the front catalytic converter for a cali emissions cat. and a FED emissions cat.?

[HoldenFast]

I need to get a few facts straight regarding cat converters on a 1995 Celica:

From this thread: http://www.6gc.net/forums/index.php?showto...35476&st=20

"most US Celicas have 2 cats (primary and secondary)- 94-95 STs have 2, 96-97 STs have one - the secondary, 94-99 GTs (94-95 cali) have 2, the 94-95 fed (non-cali) have just one, the primary."

Based on this, a '95 GT non-cali emissions vehicle has one cat, the front one coming right off the manifold in the engine bay.

From above:

"if by front, you me the cat attached to the manifold, then no, the cali spec cat has an opening for an O2 sensor that the federal model dont have (pre '96) but, the actual cat itself is the same, you can just plug the hole."

And:

"I assumed a needed the cali spec cat. because of the oxygen sensor right after the first cat. Won't the car run a bad fuel+air ratio if the sensor is not plugged in?"

This suggests if a pre '96 car has two O2 sensors (before/after the cat), it is cali-emissions.

My 1995 car was sold new in Ohio, uses the non cali-emissions style distributor & ignition, and has only one cat (the primary up front), however it has two O2 sensors, one before and one after the cat. Any ideas on what's going on?

Also, 1995 was pre OBDII. I'm told it will not throw a code/light for a bad cat (I believe it is currently clogged, but no SES light). Why the second O2 sensor then?

Thanks in advance for any help!