so it ran like a cammed out big block for 5 seconds at first start and the Yellow engine light on, idle good but hesitation when u hit gas and sputtering

disconnected battery, reconnected ---> runs really strong and smooth and good idles perfect, no weird sounds drives perfect

yellow engine light still on
disconnected battery will reconnect tomorrow morning to c if the light goes away

anyone have same problem with the engine light after valve cover gasket change?