Alright, need help..im stumped!
 

Hey all, new to the forum....
I've got a 1990 Grand Marquis and my speedometer is showing too fast by about 7-8 mph. I thought it would be the old "swap the gears" on the speedometer cable fix, but its got the electronic vehicle speed sensor. Is there any adjustment to this...or is it bad??? BTW, I also have problems with the cruise control holding speed (will barly hold 55mph and wont accelerate). Whats the common fix for this reading too fast business....really becoming a pain to deal with on I-10

really? nobody?