when u say rev thing, u mean the RPM gauge or tachometer?
check your tach amp, its in the engine compartment on the driver's side fender looks like alittle black cylinder...tighten it down and see if ur tach works...if not unscrew it take out the pins section and place a small piece of cardboard (SMALL!) in the cap then put the pins section back in and tighen back into the socket that should restore your tach, unless ofcourse the tach amp is completely shot or something else is malfunctioning....


Kris