Originally Posted by Vstrom30
If you would have clogged your cats, you would notice a loss of power. It is possible the catalysts are just weak from age/wear. The running temps will be lower with weakened cats. There really isn't a printed spec for this value either, but the values given above are generally what you might see. Looks like you already know to check for exhaust leaks. The gas cap and MAF values will not cause a catalyst code either. MAF can cause rich or lean codes, and the gas cap can cause EVAP codes.
Thanks, I'll keep that in mind. That's what I hate about only having this a few months. I'm still not 100% sure what's "right" when it comes to how this truck behaves. I could hear or feel when something was wrong with my old taco, but this new one is odd to me. I can't tell if I'm low on power, if that's how it's always been, or if it's all in my head. I'm getting my best gas mileage ever so far, so I don't think I'm running rich or lean.
I smelled my exhaust today and it smelled vaguely sulphur-y, but then again, I've never smelled it normally, so I don't know what's "normal".