Nissan Repair: 95 nissan maxima, mass airflow meter, nissan maxima

Question
i have a 95 Nissan maxima with a 6cyl.i idles fine with no misses and drives ok until i hit 2100 rpm. then the car bucks badly. if the car is in park and i give it gas @ 2100 rpm the motor does the same thing. the check engine light is not on.and i put in a used throttle body & tps.this did not help.Hope you can help me out.
                                               Tom

Answer
Tom,

Check to see if the converter is melted.  If it is it will restrict the exhaust to the point where the car will fall on its face as you describe.  Other causes are low fuel pressure or a defective mass airflow meter.  Lastly, check the distributor for oil on the optics.