GOING INSANE...HELP!!! - Installing Tach...tach bounces with bass

91LX_5L

Founding Member
May 13, 2002
1,946
0
36
British Columbia
Well I got my autometer lunar tach installed. What is happening is that the needle at idle jumps with the bass, it goes up to about 1100 rpm from about 600 with the bass from my stereo. Only when my sub is turned up fairly loud it does this. Its annyoing as hell. I want to fix it before i put it all back together.


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HERE IS WHAT I HAVE TRIED:
I moved the illumination and 12v acc. from my stereo wires to the fan/heat/ac control wires. Didnt help.
Tried hooking hp the 12v direct to battery. Didnt help.
I thought that the cause might be the coil wire was running right along my amplifier sub wire and it might of been throwing out some sort of signal. So I re-ran the wire outside of my car door and under the hood just to test. Didnt help.
Tried moving the ground from a metal plate behind the radio to the ground for the ciggerate lighter. Didnt help.

ANYONE HAVE ANY IDEA?! PLEASE! Im going crazy :bang: :bang: :bang:
 
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