This was my first time working on my gti. I got my car earlier this year and was a little scared working on it and didn’t want to screw things up. I bought an Autotech intake from ECS Tunning. Once it was installed, i turned my car on had no check engine light and took it for a spin. I thought I was out of the woods, but the next day the check engine light came on. The check engine light doesn’t flash, it just stays on. Hooked up my obd scanner and it gave me P0300, P0303, P0304, P0302. I know they are misfires, but I reinstalled the stock intake and still the light is on. Any help?