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#1 |
425hp409
![]() Join Date: Oct 2008
Location: Prosper Texas
Posts: 841
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68 Tachometer problem
I installed a tach dash when I restored my truck recently. The problem I have is that it reads about twice the RPM as actual. I connected the tach wire to the negative side of the coil as is the normal procedure. Any help would be appreciated.
Charles |
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#2 |
All stock and staying that way
![]() Join Date: Jul 2003
Location: Elkland, PA
Posts: 1,497
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There were 6 and 8 cylinder tachs. Make sure that you have the correct one.
__________________
1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress... ![]() 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... ![]() 2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels |
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