Hey guys,

I noticed this today while driving my tach started jumpin....while sittin at a light and also while drivin it the needle would flicker up and down from what it was actually registering. Any ideas as to what this is and the fix for it......thnx for any info.

 

Bop the combination meter panels face the next time it happens. Probably a corroded connection or loose connection on the back of it. Tach is driven by the trail coil assy. Might check the two white plugs going to it when you can.