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Thread: Tach is erratic

  1. #1
    Join Date
    Mar 2013
    Location
    Strasburg, Colorado
    Posts
    4

    Tach is erratic

    2002 2500 6 spd, got the cutting out part fixed. but the erratic tach is still there. Some times the tach works as it should, then it will drop to zero, or will just stop reading and just hang there. Now while driving it yesterday I had the temp gauge peg on me, check gauges light came on and the temp gauge went back to normal. Did the cluster self check, all is normal. Grounds are good, could the cluster be going out, or keep looking for a bad-dirty connection?

  2. #2
    Join Date
    Aug 2010
    Location
    Byesville Ohio
    Posts
    154
    Try the cam/ crank position sensor. That's what I changed to cure my erratic tach.
    01 ram 2500 6 speed 5" exhaust 17" tires Pacbrake exhaust brake 4wd 2wheel low switch BHAF Lukes links Fluidamper FASS FRRP Brite Box Block Heater Bumper Plug BD booster fooler and Elbow RV 275 Bosch Injectors new gasket on tappet cover

  3. #3
    Join Date
    Aug 1999
    Location
    Tri-Cities, WA
    Posts
    8,168
    Maybe pull out the instrument cluster and spray the contacts with contact cleaner.

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