Please Help.

[Wolverine69]

Hi everyone.
I have a question, I recently was driving my 1994 RX7 and noticed the rev counter had dropped to 0 and then it started to shoot up and down of its own accord, obviously the engine did not rev like this just the rev counter and now it has died completely.
Can anyone suggest any checks i can make and possibly provide me with where i can find a wiring diagram for the clocks because i would prefer to try everything before taking it to the garage.
Cheers.

[gear1275]

http://www.mazdarotaryclub.com/forums/showthread.php?t=57111
 
dude if you scroll down a tickle in the general technical section, you will find a thread called speedo problem, i think it has already gone into a bit of detail with regards to a blown capacitor on a circuit board??
my friend had the same problem yesterday on the motorway, he said it was the fastest 0-160 he has ever done!!

[neil97rs]

Dodgy rev counter is pretty common on the Fd normally just the wiring on the back  but mine needed a complete new counter:mad:

[Bobbit]

mine does it if i lock the drivers door from the inside, 0-220mph in 0 seconds, the fd\'s are seriously quick.

[trotter]

Same here, can often be found to cruising at 100mph or so doing 1500rpm....