Contour Enthusiasts Group Archives Forums General General Needles Jumpin

I recently put overlays ono my guages.... realizing that they are very sensetive, i was very carefull when putting them on.... i had them on for about a week, then one cool morning they started jumping and sticking (speedo and tach only) On warmer days, they work fine, and they work well after the car warms up... but i can't figure out why then jump when it's cold or even humid....