I have a problem that stumps the two Mazda dealers to whom I've taken the car. The fact that it doesn't "act up" at the dealers is why they are stumped. The clutch pedal on my 1998 Mazda 626 (188,000 ...

A sharp clicking noise from under the dashboard when you press or release the clutch is almost certainly going to be down to a sticky or dry clutch-pedal pivot. It could also be the clutch cable ...