2001 pt cruiser manual little over 100k miles all of a sudden it start acting up it will drive fine then I'm going down the road it acts like it out of gas kinda(has full tank ) will not let me shift out of first or go over 20 mph i let the car sit and go back out to have someone else see what it doping it run fine for a day or so then dose it again. i just had the o2 sensoer replaced two weeks ago and we checked the brakes .power stering pump was replaced a months ago.