Crazy needle.
 

http://s589.photobucket.com/albums/s...=VIDEO0006.mp4

Like seriously.. WTF is wrong with this damn thing?

I've seen bad grounds cause jumping...I've never seen one do that. lol

yeah.. it started a few months ago and was just twitching a half an inch or so.. but this is just ridiculous. lol

Awww shit! Tokyo Drift Muh Fugga:laugh::laugh: Make sure you tighten up your floor pan.

Seriously though, I think it's just like MiataMania said. I've had the same issue due to some unwanted moisture, but never that bad. Go through your major grounding points and make sure everything is adequate. Have you done anything major to the car recently, such as wiring or something along that line?

yo that shit revs like a ferrari, did vtech kick in yo.

bad ground and check the plugs that go into your gauge cluster

i kinda had the same problem, it only did it when at WOT. check all your grounds and clean them. mine stopped after that....

Mine jumped around about like that. After hunting, adding more grounds, checking stock grounds, moving grounds for ms, wb and coils I said screw it and started stripping my harness out of my car(I was painting the car anyway so why not go all out).
I have thus found 5 broken wires so far... 2 were grounds, one to a tail light that has been coming and going, the other 2 went to things stripped off the car.

I had that problem at about 198k. It seemed worse when it rained. 10 bucks your ground by your alt/ below your tb is loose or dirty. That fixed it for me.

yeah.. I replaced the engine about 6 months ago and have what seems to be open ended plastic leads on a wire here and there but they have no obvious place to go.. will probably just strip and stick to the body somewhere lol. oh and side note... at least my valve cover looks kickass. lol.

http://i589.photobucket.com/albums/s...w/IMAG0161.jpg

yep. it was the one by the alt.. I ran it to the body and it still blips here and there but it's NOWHERE near as bad as it was. Thanks DOODZ!

No help with your tach... but take a piece of black electrical tape and put it over the AIRBAG light so it blocks your view. That shit has got to be annoying as hell driving at night.

bad cas?

good point. didn't think about that. I did see something you can buy somewhere that fools the ecu into thinking the airbag is still there but I can't find it. oh well.

um "cas"? Help un-duuuuur me on that one lol. I'm drawling a blank to what that means. :dunno:

cam angle sensor, on the back of the head by the firewall, passenger side.

Or pull the light and unplug the buzzer :)

I still have the mystery spark loss when I corner over 1-g on left turns. Its making me crazy.