It will not accelerate. I push on the gas and it won't go. I changed the oil a week ago and about a year ago i changed the fuel pump

Does it idle OK ? Does it miss, stumble or skip or die ?

You need to check the fuel pressure. Unless you replaced the fuel pump w/ an OEM one, very likely it's bad.

Is the check engine light lit ? Does it have a message center ? A message reduced engine power ! This vehicle has Throttle Actuator Control (TAC) System ! drive by wire .
(1)

Throttle Actuator Control (TAC) Module
(2)

Throttle Body Assembly
(3)

Accelerator Pedal Position (APP) Sensor
The throttle actuator control (TAC) system uses vehicle electronics and components to calculate and control the position of the throttle blade. This eliminates the need for a mechanical cable attachment from the accelerator pedal to the throttle body. This system also performs the cruise control functions .
The TAC system include, but are not limited to, the following components :
?€¢
The accelerator pedal position (APP) sensor

?€¢
The throttle body

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The throttle actuator control (TAC) module

?€¢
The powertrain control module (PCM)

These components interface to ensure accurate calculations and control of the throttle position (TP).
I can tell you that you don't have the tools to test this system , you need to take it to the dealer !

Well an oil change is probably not the cause.
What IS it doing? You're telling me what it isn't doing...
Does the motor rev up?