[Gaz64]

Mike I would say you either take the offending throttle body off, examine the butterfly fit as per light coming through the barrels while closed, then if the high cylinder shows more light, you will then need to slacken the butterfly screws and reposition the butterflies until they seat correctly.

You could swap a body with one of the others first to prove it is that body.

Do you have one low cylinder, or one high cylinder in comparison to the other 7?

Gary