 Put air in the cellar, took a top bed center. Don't hear a thing. Nothing. No, no head yet. I don't think there's a head gasket issue. It's quiet. Two and four. Coils, packs, spark plugs, injectors. I give up. It's progressively got worse and worse. It used to be it would start once you drove and then when it warmed up, it would get better. Now it is dead. Both cylinders, two and four, dead as a doornail.