Tomonsw

Hi all.

It started off with a bad coil pack and plug wasnt firing. Replaced coil pack and then the Oxygen sensor went so started running rich again. Have replaced the oxygen sensor and am in the process of changing valve cover gaskets and timing cover gasket. I removed the plugs, and noticed that all were really black, probably due to bad oxygen sensor, but 1 plug, the one that had the bad coil pack is black, but the ceramic is pink??? Soaked in fuel??? Would this be a bad spark plug or a bad fuel injector? I have no idea.

Thanks in advance