Hey guys..it's been a while since I been on here but I came back to ask a favor. I found a soft code p1111 while had my car hooked up to the kia gds. It said cylinder pressure too high. I also noticed my fuel rail pressure was hitting 2400psi which is a few hundred more than it's supposed to max at. Can you guys let me know what your fuel rail is capping at? Just trying to narrow it down cause gds suggested a knock sensor or spark plugs. I know both are fine on my car. I also noticed running premium is more harmful than good causing the same soft code in other 1.6tgdi cars. I lowered the octane but it's still coming back at around 70mph. My theory is the super high fuel pressure what do you guys think?