High Tach reading

[Hawkeye]

On startup my Tach goes to roughly 2500 rpm. Not the actual rpm of the motor. The rpm will go higher, but not any lower until I shutoff the engine. I have not looked at anything yet.
Any suggestions?

 

[RobWigglezz]

Sorry I misunderstood your question and deleted my first post.

You're saying the tach jumps right to 2500 and never goes lower? The gages have posts that push into metal clips which make a connection to the flexible circuit board on the back of the cluster. They can loosen up and cause weird stuff to happen.

This will sound a little caveman, but a few taps on the dash could make the needle move if I they're loose. My tach was erratic and tapping on the dash would make it move.

On startup my Tach goes to roughly 2500 rpm. Not the actual rpm of the motor. The rpm will go higher, but not any lower until I shutoff the engine. I have not looked at anything yet.
Any suggestions?