mardyn, I don't want to call you blue boy, so indeed don't hold your breath. Installing the new battery did nothing to revive my tach and temp guage, nor did I expect it to. My tach guage still moves around a little with different RPM's, but not much, and certainly does not keep up with engine RPM's. Temp guage stuck around 150 and never moves at all. No over heating problems here : ) Hope your situation is different, but not likely.