I have an 89 S13 and it has the factory installed option of the digital speedometer with head up display (displays on the windsheild). But it keeps cutting out. Anyone else have this issue, and what can be done? I love this option but can't quite understand how to fix the problem. Basically I can't see how fast I am going. Any help will be appreciated. Oh and if you ever have the chance to get this option... DO SO, it is the coolest thing ever.