Hello everybody, I’m at a loss now because I was on the highway at 140km/h with my Hyundai i20 PB, built in 2012, and I didn’t have any performance in the underturky area after that, besides, it sounds really dull when you give off a sudden gas and you feel a setback of the air to suck in. If you give only very little and slow gas and don’t turn on 3000 or more there is no problem at all. I have now all spark plugs + Ignition cable changed, the throttle valve, an injection nozzle which caused one to hear a blow at a cylinder and a cable which was easily insulated also but there was no difference to before. The only possibility is to my knowledge that the fuel pump provides too little possible by defective or a clogged filter and therefore it cannot maintain the fuel pressure at the injectors and thus the air-fuel mixture does not If the catalyst was defective it would still have to drive normally because the Lambda probe works normally according to OBD also otherwise the car does not throw any error. Can anyone please help me?