I found a number of postings related to erratic behavior of the
> tachometer. However, none the response provided a solution.
>
> I have two problems that are similar:
>
> Problem 1: When the rpm increases beyond 2500 rpm, the tach jumps
> to 2900 rpm and will stay there until the rpm increases beyond 3000
> rpm. It has this problem continuously.
>
> Problem 2: Sometimes the tach is stuck at 2900 rpm and will very
> slowly increase to about the red line area, independent of engine rpm.
> When this occurs, I simply have to turn the ignition off and then on
> again. This will resolve problem 2 for a few days but I will still > have problem 1.
>
> About 5 years ago, I had a problem with the odometer getting stuck. I
> replaced the entire instrument cluster with a new one from the dealer. >
> I would like to hear from anyone if this problem is caused by a faulty
> tachometer, wiring or ECM output, or something else.
>
> Your help is much appreciated.
>
> Regards,
>
> Harry van der Meer
> Uxbridge, MA
I have not received any response. If there is anyone who has some suggestions, I would love to hear.
Thanks much.