In-Dash Tach Question

[xc_myers_06]

Hi, i have a question on what is goin on with my tachometer inside my vehicle, when i push on the throttle the RPM is up round 2,000 - 3,000 tach or so on, but it happens everytime i hit the gas and the tach wiggles while it is reading. so is this normal or is it like an electrical problem or is something wrong? any help would be great, i will be on all night checkin on this thread, i read these all the time so i can get back if u have more ?'s for a more in-depth answer. thanks (also it's an automatic) if that helps any

 

[xc_myers_06]

I just thought i would re-post, still no reply to this thread, i am guessing it is nothing serious but just checking, its when i am pushing on the throttle, the RPM tach seems to not read properly kind of bobbling around when it is reading varying 500 rpm different in both directions, so any help would be greatly appreciated.

 

[gcomfx.com]

are you talking about the stock tach? If so, mine started doing the same thing. I put a nice aftermarket tach in. I didn't realize how far off the stock tach was until I got the nice one. My stock tach just got worse and worse. Every once in a while it will go all the way around and get stuck UNDER the Zero limiter post.

 

[xc_myers_06]

did u just disconnect the stock tach when bought the nice, new one. do u know why it was doin that or if u can fix it or re-calibrate it to read it accurately?

 

[gcomfx.com]

Actually no I didn't unhook the old one. I hooked into the wire behind the instrument cluster, I tested the split signal and the new one is still dead on when testing on a dyno. Now that my stock tach has gone bezerk, I should go ahead and unhook it. Kinda funny to watch people's reactions when they see it though.

I personally don't know of any way to fix the stock tach.