guys, I need your opinion on my innova. recently, I had my car checked at toyota because the check engine light indicator was on. they diagnosed a faulty EGR system (exhaust gas recirculation system). it was replaced and the light went off, however, i noticed after a few days that when my engine runs above the 2000rpm mark, no matter what gear I am in, I hear this loud hissing noise coming from the engine, I dont know if it has anything to do with the EGR system that was replaced. power seem to go flat at 2000 and hirap na umakyat ang rpm. Can anyone tell me what you think is wrong with my engine? thanks a lot.