Which sensor is pertaining to the rpm and acceleration of the car?

Hi, The MAS (Mass Air Flow Sensor) has the most effect, however other sensors such as O2 can effect it is well.

How long has the check engine light been on for? Have you checked the OIL level yet? IF the oil is low, it can set a V-TEC code, causing the symptom you describe. IF that is the case, POST specific DTC(s) and I can give further suggestion(s).