Car has been sitting for a week and a half, was running like crap and had oil coming out of the tailpipes. I pulled the back plug that has been getting fouled and it had some oil on it. Left the rest of the plugs in and pulled off the upper intake and valve covers. It sat like that for a week and a half and now i finally have time to work on it again. I pulled the rest of the plugs and this is what they all look like. Is that just carbon build up from sitting for a week and a half with the valve covers and upper off or where they fouled with oil from before? I wasn't sure if they could have carbon buildup from that or not. Is my whole motor going to have carbon buildup like that if it is from sitting thre? In other words if I can't finish taking off the heads and lower soon should i just put everything back together?