Citroen C4L 1.6t accelerates stiffly, so it can't accelerate at that speed, and its fuel consumption is high.

I am 15,1.6tc4l. Last year, I just changed four spark plugs to clean the carbon deposit and the accelerator. This one has stopped running for less than 20 thousand yuan. I feel bored recently by accelerating the engine. I still can't get up when I step on the gas pedal. The engine is not responding. I keep adding 95 # gasoline. What's the problem? I added 92 knocks. I use the trouble-free light of the Force Magic 5w40, but the car is difficult to drive. I should check and abuse others. Then I changed the oil. I recently added three cases of 95. It makes no difference. Knock on the door with a new spark plug. You're right. I added 95, a bunch of questions before, and 92 in the past two years. What would happen without a spark plug? Our Citroen went bankrupt, and some faces were too ugly after the brand was sold. Did you go to the 4S shop to inspect the goods? Add the wrong gas, add 92 and you'll be fine. Is the trouble-free light on? It's hard to say. Go to 4S or specialize in it and see what the problem is. After working in the legal system for three or four years, I basically have such problems @20 19.