1991 240 revs good to 3300 RPM and then starts jumping

[mr_wizard]

I recently found my TPS was barely hanging on my throttle body, the scew had fallen out. I was sure that was the problem, so I got a new screw to put in and it STILL did it. It does it while I'm driving and in neutral. If I rev it to 3300 RPM after letting it warm up (varies on temperature) the tach will bounce up and down trying to rev passed. If I drive it, I hit 3300 RPM and it throws me back and forth in my seat trying to accelerate... wtf? Did I put the TPS on wrong or what? Someone mentioned MAFS and I replaced that, and that didn't work either. Anyone have suggestions?
Modified by mr_wizard at 12:23 PM 5/24/2006