Trouble accelerating
In Dec 2018 I replaced spark plugs and coils. I did have a high fuel pressure code. My gas mileage has decreased so I put in Chevron high mileage fuel cleaner, usually I add Lucas, that's when problems began. My RPMs are low, around 2. If I try accelerating the car feels like you're when you're in a stick and don't shift smoothly. I just replaced the high pressure fuel pump because that code came up. I'm able to drive 70 to 80 mph but it has to be a gradual increase. Any idea what it might be? I also had dealer scan and they only came up with high pressure fuel pump.



