dirty

Have to smog my car after a year to renew registration (CA DMV states I have to smog my car every single year now instead of every other?), so I have to put back on original location inlets I had sitting in my backyard for the past couple years. Scrubbed the outside and near the ports as far as...

Pics attached. Car was misfiring due to oil on plugs from either leaking VCG or valve cover itself. Regardless, when I'm changing plugs I always like to use my endoscope to see the tops of the pistons to make sure they are healthy. This time they seemed a little more caked than before, should I...