rough idle on 260E

[LordBeastington]

My 260 is constantly giving me problems. I still have not resolved the previous problem of almost dieing. Once I start the car, it drives fine but once it hits 80c, it starts to putter. It wont break 20mph and even if I am coasting, the economy meter is at full fuel consumption. Then after a few min, it clears right up. But, now, the idle is very rough, enough to rattle the dash. Anyone have any sugestions? The car seems like its getting too much or not enough fuel. Also, when its puttering and I get it going enough to shift, its very rough.