Re: Pioneer CD Player Malfunction (1994 TB)
I think you've got 2 different issues going on. It sounds like your stereo is looking for retirement, and your tach issue sounds like it might be a loos connection. I couldn't find a schematic for the 94, but in the 97, the tach is fed from the engine wiring harness. You need to check the wiring under the dash and see if there's any discoloration or any connections loosening.
Prius repellant, just add gas.