Only one other thing comes to mind, and that you did check. Cylinder Compression. Which could indicate a Blown Head Gasket.
Check your Oil - Does it look like Milk Chocolate? If so good indication of blown head gasket.
Check for Oil in Coolant - another good indicator.
Check out link below for how to check compression
https://www.2carpros.com/articles/how-to-test-engine-compression
Sorry go to get to bed have to work EMS in am. Hope this has helped some anyway.
Wednesday, February 2nd, 2011 AT 4:22 AM