'96 E300 buckin' and stumpted?

[quinby1]

I have a '96 E300 with 60K, she starts to buck at about 2000/2500 rmps, only when warmed up. Idles fine, accelerates fine, but after about 10-20 miles, starts to buck (like miss). this started in July, I changed main fuel filter and it seemed to stop until last week...then it started again.... have changed all filters...no code shown on computer hook up??? Noticed when I changed fuel filter the inner gasket from filter was frayed and some small rubber shavings were loose around filter bolt...so if some rubber particles have make their way to the injectors etc., why doesn't it miss all the time? It only starts to miss or buck when you're keeping a steady rmp,,,,,at about 55 to 65 mph...bucks till you give it the accelerator, then stops for a while, then starts again, then stops, etc..... driving me nuts....help..