Cluster swap, tach started reading low
Hey all! First time post. These forums have helped me tremendously over the past few days, but now I have an issue that I haven't seen any threads cover (forgive me if there are). I have a 95 Ranger XLT 2.3L 5-speed. My truck didn't come with a tach, so after browsing the forums, I figured I could pick one from the junkyard from a ranger/explorer from the same gen, excluding some years. Well, I found a 97 explorer with a beautiful cluster sitting in it so I pulled it, installed it in my ranger, and voila! It worked! RPMs read correctly, everything else too (other than the temp gauge reading a bit high). Well, when leaving work the day after I installed the new cluster, I noticed that my idle was sitting about 200-300 rpms below what it was the day before(the day I installed it). It is sitting at about 500rpm at idle now, when just yesterday it was about 800-900. Also when accelerating, the needle wont go past 3k without sounding like its redlining. Like its slow to move or just reading like 2-3k too low. When just the day before it was dead on, worked like a charm. Does anybody have any ideas to why it was working fine for the first day and a half and now its reading low? Any help is GREATLY appreciated. Thanks in advance.