car is bucking under acceleration...any ideas? Options

[era vulgaris]

My car has developed an extremely annoying bucking under acceleration. It started about a week ago, and at first it would only happen while accelerating out of a fast turn. But now it does it all the time while accelerating. It's like the car is oscillating between half power and full power, making it lurch-slow-lurch-slow-lurch-slow. It's like you're riding a bucking bronco or something. The only cure seems to be to get off the throttle completely, upshift, then slowly accelerate.

Anyone have any idea where I should start looking first?

[era vulgaris]

Motor mounts and trans mounts are still good.

TPS has been on my to do list. I should check it anyway. The stumble isn't while cruising though, which I understand is what happens with the TPS. My problem's only with acceleration.

Yup, still D jet - it's in the sig! (IMG:style_emoticons/default/wink.gif)
It's anyone's guess if the tank has been cleaned or the screen replaced. I've only owned the car since last november, and I wouldn't trust a word the PO says about it.
That seems logical though, considering the issue started with hard cornering. Maybe some sludge got knocked loose.

[brp986s]

Motor mounts and trans mounts are still good.

TPS has been on my to do list. I should check it anyway. The stumble isn't while cruising though, which I understand is what happens with the TPS. My problem's only with acceleration.

The TPS provides accel enrichment. You can spot check by turning ign on w/o starting engine, then go to engine and operate throttle valve. You should hear clicks from the injectors firing.