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Tach Signal

Discussion in 'ECU's, Electronics, and Tuning' started by ChrisSiR, Jun 10, 2004.

  1. ChrisSiR

    ChrisSiR Senior Member

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    Im looking for a RPM output from the ecu, but i cant seem to find it, theres not exactly a "rpm output to tach" slot on the pin outs, in the reference section....


    so, my question is, which pin is the out put?

    and, does the signal from the distributor go to the ecu, then the tach, or just straight to the tach?
  2. tab

    tab Super Moderator

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    I'm not sure on the routing, but I'd guess that the wire goes to the ECU first. Just a guess.

    What I do know is that you tap into the tach wire at the distributor. It's probably the simplest solution. On my car I believe it was a blue wire.
  3. Import R

    Import R Senior Member

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    Taken straight from the autometer site:

  4. ChrisSiR

    ChrisSiR Senior Member

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    Well, the blue wire on the dist. doesnt work (im installing a MSD window switch BTW), and i cant seem to find the diagnostic plug, it just wont pick up ANY kind of signal....idea's?

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