Great News!!! Like Clay said its a process of elimination. Great job staying after it and getting resolve.

Who is the mechanic at KGTU?

Quote Originally Posted by LBlack View Post
"Vibrations" (engine roughness a better description) - they have ended! Great A&P here in Georgetown got to the root of the problem. Turned out to be an induction air leak due to nuts becoming loose on a cylinder collar.

Thanks for all your input.

Happy ending!