Tacho Problem

[Master Yoda]

when im driving along my tacho jumps up an extra 500 - 1000 rpm

ie. when im travelling at 1000kph in 5th according to the tacho the engine is sitting on between 3500 - 4000rpm, however the engine note does not change at all, ie doesnt sound like it is revving that hard.

any ideas, or do i just disconnect it and shell out for an external tacho.

-Mike

[boostinhard]

Hey,
1000kph? Let me go for a ride in the sound barrier breaking exa!!! haha na man, I gotcha ;)
Hmm, well my factory tacho is up the ass - so think yourself lucky that yours works half the time!!!
Sam

[rquinlan]

Tacho's are very temperamental items there is a wrecker in preston (melb) pm me if you want the address, this wrecker is the only one i use and they have everything. You cant really fix a tacho they are just about throw away items.

[Master Yoda]

sammy im glad you know what i meant, i think i might just save up the cash and get a external tacho, not a monster one, just one that will do the job.

I just was hoping i could get the thing working cos it is sitting on a nismo et dash with white face dials

looks nuts but i can't read my odometer, and trip meter dials cos the dash is front lit, i think i might mount another light into the bottom of the dash

-Mike

[boostinhard]

Hey,
I have a spare guage cluster that you could use and put your face on - would still give you the ultra cool nismo style face, with working instruments! Sell it to you cheaper than I bought it for!
Sam

[Nisman]

my tacho jumps around a lot too, the other day i worked out the problem, however i havent had time to follow it up.
my problem appears to be a poor earth in the stearing column.
how i found that out....
if you have a turbo timer, run the motor on turbo timer, put the steering wheel lock on, and when the tach goes down, twist the steering wheel.
i found my tach would jump back up when i twisted, and down twhen i let go....
so i am guessing a loose wire in the columb.
plus it sometimes drops out when i put the blinker on.

[Marchoos]

LOL Amen to that Sam! My tacho is up shit creek too Let's just say it has it's good days and it's bad days. Hardly does it ever come on. I could just be driving down the road when suddenly without any warning it will start working, then it eventually drops out, kerplunk! Must be bad earth or something. But hey... i guess the real pro's listens to the engine and plays it by ear. hehe. Sheesh im so full of it today! :help:

http://www.n12turbo.com/cars/mark/thumb_myexa4.jpg
n12turbo.com's recent addition to the EXA gallery!
(About friggin time!)