Haven't pulled the heads but I think I found the problem there was quite a bit of oil in my plenum from failed pcv valves and a lot of burned on oil/carbon on my intake valves been cleaning the with atf (seems to be working well) but I found the cylinders with low compression each had 1 intake valve that are leaking the aft slowly not allowing it to clean the carbon off I will just keep working at it probably do a leak down this weekend to get an idea of exhsust valve and ring condition and post findings