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Hello everyone,

Here is my issue.

I left the car sited for almost 1 year and half (I built my house). When the times came to move the car to my garage, no problem to ignite it. I moved it here, the car worked well, but i found out the tachometer needle moved only to 500rpm position. Good repsonse with the car throttle, it ran great on the road.

What could be the problem? or what kind of troobleshoot i can do to investigate? 

thks for your help :)

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My car doesn't have a tachometer so I've never had the opportunity to look at the circuit. Is your's original equipment or aftermarket? 

Rocketman is one of the shops that repairs classic car instruments. It appears that he converts it from the original current sensing device to voltage sensing:

Rocketman's Classic Cougar Innovations

 
 
 
 

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I wonder if in a year+ of sitting, some spider or bug got into it?  You might take it apart and see if it spins freely?  A single drop of oil in the right place could fix it.  But that means taking it all apart. 

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