[Elecraft] 17 meters

[Paul Gates, KD3JF]

I am wondering what the solution to my problem might be. I have a MFJ 989 tuner and it works fine except on 17 meters. I have the cross needles and they both shoot up to 12 0'clock and cannot get a resonant point. Some have told me I should shorten the coax. I am using a G5RV with 300 ohm twin lead and coax into the shack. I am having suspicions that it is the tuner. Any suggestions...
 
 
Paul, KD3JF
Glen Burnie, MD
FM19qd (Map Grid Square)