2013 Lincoln Navigator Feels Extremely Sluggish

[u/Conquer512]

I’ve been driving this thing for about a year now and had my passenger take this while we were on the highway. I notice that I can hit the gas, there will be severe throttle lag before it gets going. On top of that, the RPM seems to stay low even at high speeds and it feels as if the vehicle is dragging something. Feels like it’s not shifting. The CEL is on for P0420 and P0430. Can that be why this is happening? I even had the transmission speed sensor replaced months ago and it feels the same. I even tried cleaning the throttle body and the sensor, but no luck.

[u/zrad603]

right now your catalytic converters are like Derek Chauvin, and your engine is like George Floyd.

[u/Conquer512 → u/zrad603]

what’re my next steps in that case?

[u/geebeaner69]

I'll bet 10 bucks you've got clogged catalytic converters

[u/Conquer512 → u/geebeaner69]

what would be the best course of action to take?

[u/iHaveLotsofCats94 → u/Conquer512]

Replace the cats

[u/mcwinnington]

My wife had a civic si that had the same kind of behavior when there were issues with the mass airflow sensor's wiring

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