Well my "new" used 1999 ZX2 that I recently purchased has tach issues. At idle the needle drops way down to 200 or even zero. It is running fine so the tach is messed up. Also I have seen it jump around a bit while driving at times. It does not do it all of the time but I want to fix it. My old car had tach issues as well. Do these tachs just suck and have issues? So last time I went to the junkyard and pulled an entire cluster and just swapped it. But that means that the odometer mileage changes. Last time I swapped a cluster that had an odometer reading of 189,000 to one that read 122,000. So I magically lost 67,000 miles. But I don't believe that the one that was in there was original either since it appeared to have some junkyard markings on it. The only thing I can be certain of is that I have put over 200,000 miles on the car. The options are to once again get a used cluster and they are readily available on Ebay. Also there are a couple of new old stock tachs for sale. Ford part and brand new. But either way if I want to keep the mileage the same I need to swap the actual tach out of the cluster. Is that fairly easy as last time I did not do that? I believe there are a few screws and it simply unplugs. I like the idea of putting in a new one. But why are these tachs so flaky to begin with or did someone mess up when they got into the cluster and break something? I have now had two ZX2's with the same exact issue. And I can see by the slightly broken dash panel that someone has been in to this cluster before as well.