1979 Chevrolet El Camino What Would Cause a Tachometer to Run Backward? After Some General

1979 CHEVROLET EL CAMINO

70,000 MILES

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

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.