I had the same speedometer problem on my prelude as well. for me it was the speed sensor. my engine check light came on and speedometer didn't work. Does your Rpm meter still work? Cause when my speed sensor went out my rpm worked but my speedo didn't. You should check this before you order any gauges to replace your current one because if your rpm meter still moves then most likely its your VSS. Oh yeah and vtec won't kick in because of a dead speed sensor...trust me i've tested it when my speed sensor went out. I'll try to take some pictures so i can show you where the speed sensor is at...but just in case i forget its behind the motor on the left side where the tranny is at...check underneath the intake it should be somewhere around there where you can see it.