Aftermarket tach bouncing.
Thread Starter
Racer
Joined: Apr 2015
Posts: 412
Likes: 12
From: Carrollton, Georgia
Aftermarket tach bouncing.
I recently installed a 4l80e into a 77 corvette with a US shift controller, also installed electronic tach and speedo at the same time. The problem I'm having is my tach is acting up. With the key in the on position, the tach will just slightly bump up and down. It's a consistent flutter. And you can hear it in the speakers..this is with the engine off/key on. The us shift controller is registering this bump as well. Basically it will read 95-100 rpms with key on- engine off.. any thoughts?
this is causing issues with WOT throttle shifts because the controller uses rpms to determine WOT shifts..
this is causing issues with WOT throttle shifts because the controller uses rpms to determine WOT shifts..
Intermediate
Joined: May 2009
Posts: 28
Likes: 2
I recently installed a 4l80e into a 77 corvette with a US shift controller, also installed electronic tach and speedo at the same time. The problem I'm having is my tach is acting up. With the key in the on position, the tach will just slightly bump up and down. It's a consistent flutter. And you can hear it in the speakers..this is with the engine off/key on. The us shift controller is registering this bump as well. Basically it will read 95-100 rpms with key on- engine off.. any thoughts?
this is causing issues with WOT throttle shifts because the controller uses rpms to determine WOT shifts..
this is causing issues with WOT throttle shifts because the controller uses rpms to determine WOT shifts..
Melting Slicks
Joined: Feb 2006
Posts: 3,105
Likes: 96
From: Sunrise FL
Thread Starter
Racer
Joined: Apr 2015
Posts: 412
Likes: 12
From: Carrollton, Georgia
