[BlueRooster]

Last night I went for a nice long drive. Last week I installed the
Optima 34 (red top)and all went well. She seems to start better cold
and hot. While driving last night though, I noticed the tach bobbing
up and down...kept looking and it would just die and then come back
to life. By the time I got back home, this seemed to disappear. No
other gauge had this problem and the car ran great otherwise. Do you
think it is the tach itself? Or a wire? The new battery? Anyone
else experience this?