300TE tachometer won't go above 1k rpm
 

reving car up tach, rpm reading won't go above approx. 1000 rpm. I believe the fuel pump relay also handles the tach. Exchanging relays & checking plugs on back of instrument cluster haven't changed things.
Any suggestions?

maybe the gear is stuck?

a bad ground can cause this. try pulling the cluster and running an extra ground wire from the back of the metal part of the housing that has the tach to a metal ground point on the car (there are plenty behind the cluster).

300TE Tachometer won't go above 1k rpm
 

Thanks for the idea on checking for bad ground. I tryed this but no improvement in results. Any more thoughts?

:) sticking gear!

What I mean is that maybe the internals of the tach came out of alignment and the gearing can only move so far before it locks up.... a jumped spring could cause this.....

My recommendation:
Buy a used cluster (a three gauges in the big shell) from ebay for about $30
Take it's tach and swap it with yours...
If it does not work, then I will buy the cluster from you for whatever you paid plus shipping... I am not kidding, I am dead serious! :hair:

But I could be wrong, just wait a bit, someelse will chime in with some more tips real soon! :)

This link describes how to check the rpms at the X11 diagnostic connector. While it may not be totally helpful, you might be able to isolate the trouble:
http://www.landiss.com/mixture.htm

Lol, maybe I gave bad advice... my tach started acting up today! LOL I am cursed! :(

Your problem happened to me when I took off my cluster to try and fix the odo....

i think you should try to take out the cluster....and disconnect and reconnect the tach wire.... maybe use a little dielectric grease on it..

I am not much help... I totaled out that car before I had a chance to take my own advice...

Sorry to hear that about your car. :o