car starts fine and idles where its supposed to but while idleing the whole car vibrates put it in drive and its not as bad till you get to 30 mph then it really vibrates but after thirty goes away alittle. also when stoped and trying to accelerate at first it almost dies then takes off un less its cold then it only hesitates alittle, ive replaced fuel pump, filter, mass airflow censor, idle control censor, fuel pressure regulator, 3 vacume hoses under the plentum, pcv valve, spark plugs, the whole distibutor into the motor, im lost help