Fellas: After tuning up the 760, i decided to put a cd player in the car. I noticed later in that my Turbo guage stopped working. No other symptoms or fuses seem to be bad. Its stuck at the halfway point.
Id check the vaccum hoses that run to the gage you might of just put a kink in it although I really am not for sure on this because I have never had to deal with this problem with my turbo 740. Also check under the hood to because you said you also did a tune up