I might be facing this issue. For the last 1 week or so, during incline with AC ON, I find the car coming to a stop, unable to go up. I have to raise the rpm with clutch on and push it up. Or switch OFF AC and raise rpm. Also, sometimes I get a feeling that I have released the accelerator for a moment, though it would be in the same pressed position as it was before. I do not remember when the EGR was cleaned in my car. I guess it was about 40-45k kms before. Should I try cleaning the EGR?