[2.5x_sleeper]

If you haven't replaced your front O2 sensor, that might be a good place to start. If the engine was running overly rich, I'd expect to see a P0420 CEL code, but perhaps it's not bad enough yet.

There are other possibilities:

• Poor quality fuel.
• Air filter needs changing.
• Needs new spark plugs.

All guesses of course. :wink:

Bobby...

My MODding Journal