I'm in a pickle. Tried to remove the spark plugs last night, removed all the gunk from above 3 & 4, coil packs out, plug socket in and boom, nothing. Couldnt budge them. Not a sausage. Now i've read contradicting threads, some say you are best to remove when the engine is warm, others say cold. Engine was reasonably warm at the time, anyone got a conclusive answer for this?? What are my options if they wont budge? I have a fairly annoying misfire around 3000rpm so they need to go, no option. Do i just go hell for leather and face having to remove the head??