from experience,. if your tps is not correctly working, you can be rollin then step on clutch pop it in neutral or whatever... and the rpms drop waaaaaay low and sometimes even dies out... whether you are doing 15mph 20 or whatever... it just drops way low... i replaced my tps, made sure all vaccum was connected\ sealed up... and now when i press clutch it just drops to 900 and stays ... i say its the tps...