I had to replace my catalytic converter a couple of weeks ago and since then my 3.0 has an unburned gas smell in the exhaust. So bad, I start it outside, fumes linger in garage too much.

Engine has a K&N Filter pak and I adjusted the AFM two notches leaner. It was running fine before the cat replacement; it's an aftermarket - couldn't see paying Toyota pricing.

All the stock sensors are in place as is the stock muffler.

Any suggestions? Thanks!

 

maybe bad O2 sensor when did you last replace it

 

new 02 sensor, just for kicks, disconnect the battery to kill the computer. after 30 seconds reconnect it

 

I've got a RV cam in mine. The AFM and ECU don't seem to adjust to weather changes very well. It will run rich or lean as the wheather changes. Unburnt gas will kill a convertor. Really a PITA, I just turn the AFM wheel one click depening on the situation.

I'm sure its not the best solution.

 

Have you used an ohm meter on that handy dandy throttle position sensor? That can affect fuel ratios as well if it's not in spec.

 

well I have the smae smell coming from my exhaust and it seems to run a few rpms higher at idle now too, I have not changed the o2 sensors and I always have a check engine light on. does this sound like a classic o2 sensor problem?