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Thread: Tach doesn't work.

  1. 02-24-2012 #1
    99VetteFRC
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    Tach doesn't work.

    I really need some help. I have a '03 Silverado PCM, harness and 4.8L in my '70 Chevelle. I've read the threads on this and cannot get a straight answer. I hooked my SunPro tach to the #10 cavity in the green connector(Engine speed sgnal) and get no reaction from the tach. I changed the dip switches to 4 cylinder and back to 8 cylinder, nothing. Can someone please tell me what to do.
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  2. 02-24-2012 #2
    flame
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    http://www.lt1swap.com/lsx_tach.htm
    1997 Trans Am WS6 - LS1 swap - TR224 - Pacesetter Longtubes - Yank SS3600
    - 3.42 Moser 12 bolt - Wilwood Brakes - HP Tuners tuned - P1SC-1 Procharger
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  3. 02-25-2012 #3
    99VetteFRC
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    Quote Originally Posted by flame View Post
    http://www.lt1swap.com/lsx_tach.htm
    Thank you very much for the link... worked perfect.... I now have a tach.
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