So I have a strange problem... I can run my 08 FX HO in Low Output mode and it runs solid never a problem. However, on occasion when I put in High Output mode after running it for several hours when you turn it off it will not start (it just gives the green light and the tach goes to the far right but will not turn over) I can pull the fuses and it will crank fine. Could it be a plug or air filter? Looking for any suggestions.