Hello everyone. I have a 1996 Z28 camaro 5.7 liter with ASR. A couple of weird things have started to happen in the last couple of months and I hope you can help or let me know if any of you have had these problems. The first thing is, when I am in drive at a standstill my tachometer is at zero rpm, and even when I am going 40mph, it still only reads 500 rpm. It seems like the the tachometer is off by at least 600-900 rpms. I never really know what rpm the engine is at. The engine has no problem with reving or anything, its just that the tach is way off. Now the second problem is that the spedometer is always exactly 10mph off. I have not changed the gears or programed the car. If my speedometer says that I am going 30mph, I am actually going 40mph and have recieved several tickets because of this before I figured out that the speedometer was wrong. All of the other gauges work fine except for the speedometer and the tachometer.