87 GN analog car just installed new speedo cable . At start up put car in reverse needle jumped to 25 mph at idle. After driving 10 min the needle rest at 25mph instead of zero and showing wrong mph while driving. Scan Master and my cell phone show correct milage while driving and idle. What...
I bought a unit removed from a so call 86 GN years ago . One night driving police pulled me over issued me ticket for 15 mi over speed limit . Only change was unit change. Before my court date I took car to calibration shop who informed me unit was off by 15 mph. I ended up paying the ticket. I...