jumpy tach

could be the cylinder selector switch in the gauge package is dirty or the tach itself is going bad.

you can just replace the tach part of the gauge package. Its head in by a few screws in the back of the cluster.

93 LX said:

you can just replace the tach part of the gauge package. Its head in by a few screws in the back of the cluster.

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My tach jumps too but not at idle. When Im driving it will go from like 3k rpm and jump backwards, sometimes below the 0. I bought a 5" tach which works great but the stock one still does that and its annoying to see sometimes. Ive posted before and no one knew what it was. I guess I got to check the connections in the back, etc. Or maybe just get a new unit, do you know where they sell them at? Thanks

Stock tach is terrible... I was tracing a problem in my car for over a year, becuase it wouldn't rev past 5,000 rpm.. Turns out it was just my tach giving false readings. Get a good tach for proper readings. My $.02!!

i would take a trip to the bone yard.. odds are the tachs are ok.