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My tach is stuck at 3000 rpm ....

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  • My tach is stuck at 3000 rpm ....

    At least the engine isnt. What could cause this? Its been off by
    at least 1000 rpm since I got the car, then I found that the cigarette
    lighter was disconnected, after I hooked it back up the tach went bad.

    Oh .. 63 Avanti R1 .. manual trans .. etc. Where does it hook up?
    Anyone have a link to a wiring diagram for it?


    "Tactful". Thats my new word, I will attempt to be "Tactful Tom" and
    not "Negative Tom".

  • #2
    Start with the wiring diagram in the shop manual. Chances are it's the tach head if the pointer is stuck with no electrical power to it. These have a sender up under the dash mounted to the metal cross brace. It's in a round metal container, about 3" in doa. Check all wires for freying or loose connections. Yopur comment about the lighter... bay be a short somewhere. Hope this helps


    • #3
      Avanti wiring here (click to enlarge)

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      • #4
        OK, update. I drove the car to work today (boy do I need an exhaust),
        and the tach is now moving again. Its off by 1000 rpm (at least). I
        think its a connection issue (image that! On an Avanti??). Thanks
        for the input guys, I will check out the pic JDP.

        '63 Avanti R1, '03 Mustang Cobra 13" front disc/98 GT rear brakes, 03 Cobra 17" wheels, GM alt, 97 Z28 leather seats, TKO 5-spd, Ported heads w/SST full flow valves.
        Check out my disc brake adapters to install 1994-2004 Mustang disc brakes on your Studebaker!!
        I have also written many TECH how to articles, do a search for my Forum name to find them