2001 pontiac firebird help ok when i press the gas hard car sputters .?

[Lynn]

ok when i press the gas hard car will sputter . now i just had this engine put in and car was not sputtering till i gave it alot of gas then it started sputtering, now the last engine did the same thing it sputtered when i gave it gas. what can this be i know its not the engine ... please help what do i do

Additional Details
ok just change the fuel filter, and still doing the same thing, also change the oxygen sensor. the egr, the mass air sensors and still doing the same thing. i was told that it will be a good idea to look at the crank sensor, but the car starts fine will that have something to do with the way its driving now ????
3 hours ago

and when put on the computer at auto zone it still saying the mass air sensor but i changed that why will it still come up???
3 hours ago

 

[BRYAN]

You might have wiring issues with the mass air sensor. Or if your using a Kand N air filter you could be getting that cleaning oil on the sensor.