so, i got a smog check
and faild, 92 v6 auto

my hc at idle and 2500rpm were about the same at 2200, legal is 220,
my cat clogged about a month ago so i just cleaned out the honey comb stuff,

my check engine light is on too running lean and getting about 13mpg, with 32 and 4.88 stock gears, i was getting 15mpg city after i replaced alot of stuff after my sister blew the head gasket, about 3 months ago.

for the lean a\f ratio, i replaced the o2 sensor with an oem replacment, denso one, didnt change anything,

any sugestions?

It's amazing what a new cat converter can do for you... Oh, and Denatured alcohol and/or acetone can be your best friend when playing the smog game...

One clue...

Youll never pass smog without a cat working for ya. Besides, its the only smog device that really does what its supposed to. Not to sure what to say about running lean though. Is your EGR stuck in one position? It could ba clogged with carbon.

A new cat should solve the HC level, you can get them ready to bolt in for about $75 at autozone, or $55 and you have to weld on your old flanges(cut them off the old cat), or new ones.

The O2 sensors when they fail normally richen the gas mixture so not to harm the engine.

You are either getting too much air from an unmetered source(i.e., a vaccum leak somewhere, intake manifold leak, crack in the intake tube), or not enough gas from clogged fuel injectors or filter. I would check all of your vaccum lines see if they are cracked or split around the fittings. If you don't see anything obvious, you can check them for leaks by using a small propane torch by cracking the valve a little and holding it near the vaccum lines, if the engine speed increases you found the line that is sucking in air. Next replace the fuel filter, I would also retorque the intake plenum bolts. This would be the cheapest places to start. If it is still running lean, pull the injectors and have them cleaned and rebuilt, should run about $225, then replace the intake manifold gaskets.

Check the FSM at the top of this forum and see if there are any pointers for running down the lean problem. You need to get this fixed soon since running lean is a quick way to burn a valve.

I ran into the same exact problem with my 87 a couple of months ago. I ended up replacing my cat with one I purchased from checker auto for $70. They actually sell one that is Toyota specific and has the bolt on flanges already attached, so there is no welding needed. After install, I re smogged and it passed like a new car literally! One part of the test I had to score a 220 or below and it was failing at a 2100! After install I passed with a 4! If you go to the checker website, You should find what you need.