o.k. how to explain....after driving for 45 min to an hour, my tach and speedo loose track of what is going on. They do not respond properly and give false readings. The tack will keep climbing pasttop rangealmost all the way back to zero like it forgets where home is. The speedo will either lock into a random location or steadily read less and less in proportion to the actual speed. At one point it was reading 5 mph when I know I was going at least 45 mph. Normally, shutting the car down for a period of time will reset both guages. Today, cruising down the freeway, I was traveling along at approx. 77 mph when I came upon a state patrol. I backed the speed down, but the tach and the speedo stayed in that position. They didn't even move when I came to a complete stop. I've found that I can get them back to "home" position (after sitting for a half hour or so) by turning the ignition on and off about 20 times without firing the engine. Each time I turn the key, the guages drop a little toward "home".

Also, all other guages work properly. No check engine light or performance problems.

ANY IDEAS???

 

u prolly need an Instrument Panel Cluster. do u have ne ipc codes?