I've been noticing this weird tick in my car's personality lately. She likes to buck like crazy in 2nd, around 2k to 2250 RPM, and from about 1850 to 2250 in third, if I'm just puttin along. like tailing traffic on 405, not moderate, even hard throttle. just chillin.
I'm no pinball wizard, but I'm leaning towards either MAF malfunction or front cat clogged. rear is gutted already, due to misdiag for a failing fuel pump, TPS has been swapped with a scrapyard model of same MY range just to test, as well as the coilpack, which looks newer and actually has a part number versus the old one that looked like a Chinese Special.