lobby350

Hi guys, I just picked up a '98 EX 2 door with about 261K on it. Runs great and all but the tach does some goofy stuff. It doesnt work properly at all, right now its spun all the way around passed 8K pointing at about 6 o'clock. I've already gone back and spun it around back to zero, but the next time you start it it'll not move for a while or jump up, stop, and slowly creep up untll it stops at the 6 o'clock position again. What's my issue here, what do I need to test/check to see whats causing my issue and fix er? Thanks in advance

grumblemarc

iTrader: (4)

Sounds like it's broken to me.

lobby350

What exactly? It seems like its getting some kinda signal from wherever, but its all wacked out.

grumblemarc

iTrader: (4)

The whole damn thing. Replace it.

lobby350

So your saying ill need to get a new cluster? Lol, sorry.

grumblemarc

iTrader: (4)

Where did I say replace the cluster?

lobby350

Well the "whole damn thing" can mean the cluster...or something behind it. Or the car

grumblemarc

iTrader: (4)

You were talking about the tach. I said replace the whole damn thing. I can't help what you want to infer.

ekz6coupe

Your best off checking for your rpm signal if good replace the cluster or go with an aftermarket tach

lobby350

Where do i check for the signal?

ekz6coupe

Let me look for ya its been awhile since I've done that, its one of the wires coming out of the dizzy

ekz6coupe

Easiest way is there is a solid blue wire behind ur cluster that u can splice into,

lobby350

Ok thanks, and i assume that also gives the signal to the tach itself right?

ekz6coupe

Yes the blue wire is the feed to the tach if there is no signal it can run deeper then expected

lobby350

Ok thanks, ill check that out and come back with what I find.

vinem1

So how did you fix it ?

dumpedeg16

it could be the dizzy

lobby350

Haven't gotten to it yet it's currently at my uncles right now hopefully ill be able to check it out tomorrow.

E_Del

lol my 2000 DX doesnt even have a tach . . . lucky

lobby350

Ok so i just used the little test point with the trusty ole multimeter and it was saying about 700rpms at idle which of course is normal. So does this mean the signal coming from the distributor is fine and the problem lies in the tach itself?

TOO MUCH TORQUE

jumping tachometer = dying ignition ignitor.

lobby350

Even if it sends a normal signal to the test plug?

-A more detailed description of the problem now that I've been driving it: When just normally driving sometimes it seems to just stay down at zero. When cruising sometimes it'll catch my eye jumping up to 6k and then slowly moving up, or just staying there. When i shut the car off it goes back to the 6 o'clock position.

lobby350

bump

Anyone? The test plug wire comes off of the same blue wire that goes to the tach right? So if the test plug is reading right, then it must be something in the tach itself right?

Former User

Replace the tachometer or cluster.

lobby350

Finally found a used OEM tach unit on ebay, just installed and it works just as it should. Thanks everyone