Inliners International Forums General Discussion Hi Performance Slight miss on my Chev 250 L6

You might try putting a vacuum gauge on your motor. It's sort of a lost art these days but some of the others are right, you may be having a little valve issue. It sounds to me like you have a little intermittent miss. If the vacuum gauge is bouncing around a little, you might be having a valve hanging up, or bad cam lobe