1. Missed the live Ask the Expert event?
    Not to worry. Check out the archived thread of the Q&A with Ken Hutcheson, President of U.S. Lawns, and the LawnSite community on the Franchising Forum.

    Dismiss Notice

Tach. signal problem

Discussion in 'Trucks and Trailers' started by Silverado84, Jun 4, 2000.

  1. Silverado84

    Silverado84 LawnSite Member
    from Oregon
    Posts: 4

    Anyone ever seen thisone before? I recently installed a tachometer in my 84 half ton Silverado-305, HEI dist. I'ts hooked up correctly, but the needle &quot;jumps&quot; anywhere from 200 to 500 R.P.M.'s....at IDLE or STEADY throttle ONLY !!!!!!! Under acceleration the needle is steady & appears to work correctly !!!! A bad module ?? a wobbly shaft ? an elect. prob, somewhere else????? Thanks, in advance, for any advice given.........Jesse<p>----------<br>Jesse Sketo<br>Jesse Sketo
     
  2. bob149

    bob149 Guest
    Posts: 0

    lots of low end tachs wont work well with HEI. Some come with a little potentiometer that needs to be wired into the signal (green) lead. this can be adusted to take out the bounce.
     

Share This Page