1979 Chevrolet El Camino Would Cause Tachometer Run Backward After General

1979 CHEVROLET EL CAMINO
70,000 MILES
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OZMUNDO
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What would cause a tachometer to run backward? After some general ignition work I hooked up a manual tachometer to my 1979 El Camino only to discover it ran backward - rpm "dropped" when the engine accelerated. I tried swapping the wires that feed into the coil (HEI distributor) but no change. What the...?
Oct 22, 2012 at 9:44 PM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
Usually it is wired off the negative/tach side of coil. Any instructions with tach?
Oct 22, 2012 at 10:06 PM
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