Hello friends, I have a Peugeot 407 2.0 gasoline automatic transmission vehicle. My car should normally go 90 speed at 2500 rpm but it goes 90 speed at 3000 rpm. For 2 years, the car accelerates slowly. What could be the problem? Friends, please help me. The parts I changed are: Crank sensor, Brake switch, MAF sensor, Transmission speed sensor, Coil spark plug, Transmission oil. General maintenance has been done and all parts are original.
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