- Apr 1, 2005
- 13
- 0
- 0
i have a question when you turn my key on my tach shoots up to like 4 grand even when its not crunk when it is it wont ever come down below 4 but it will go up past it its done this for a while but its never really bothered me any suggestions its a 92 mustang nonturbo maybe its the tach signal wire maybe its grounding out or somethan which wire is the tach signal wire thanks