This is topic Tach question in forum Tech Talk at Northern California Ford Owners  .


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Posted by 306Coupe (Member # 4988) on :
 
My Tach double the RPM reading. Can anyone help?
 
Posted by Blu50Stang (Member # 489) on :
 
Is it new or used? What brand(assuming it is an aftermarket tach)?
 
Posted by HungryHippo (Member # 537) on :
 
it its aftermarket, it might be wired as a 4 or 6 banger setup
 
Posted by 306Coupe (Member # 4988) on :
 
It's used. It's a Autogauge. What wire do I have to cut to make it accurate for a 8 cylinder?
 
Posted by jay-vee (Member # 2708) on :
 
the Auto gage is wired for a V8, to change it to a 6 you clip the BROWN wire that sticks out of the back, for a 4 cyl you would clip both the BROWN and ORANGE wires. Check to see if those 2 wires are clipped on the back of your tach
 
Posted by 306Coupe (Member # 4988) on :
 
I'll check now
 
Posted by 306Coupe (Member # 4988) on :
 
There are only the black red green and white wires coming from the back [Confused]
 
Posted by AJBlackGT (Member # 3936) on :
 
Theres a few smaller gauge wires that you can pull out of the hole on the back also.
 




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