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RPM guage red line all the time

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TNTupinsmoke

New Member
Joined
Nov 6, 2002
Messages
4
Just bought this hunk of junk 87 buick gn and the tach guage is pegged all the time while the car is on. What color is the wire to the tach and what does it connect to.
 
Hunk of junk?
Check to make sure that there is nothing connected to the 2 wires behind the alternator. I think one is green and other is black. They should NOT be connected together. One is a power feed to fuel pump and other is tach signal. Slim chance this will help with the "junk" tacks we have. Next option is to get new chips for the tach, do a search, someone has them but don't remember who.
 
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