I'd bet it's your MAF sensor. Clean it if you haven't. Also, make sure your plug wires are good because a misfire can cause that code as well, and misfire codes aren't always logged. Maybe the clogged cats are causing it.
A forum community dedicated to Ford Thunderbird, Mercury Cougar and Lincoln Mark owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, maintenance, and more!