Read the tech article on HEI Coils And Modules, brought to you by the experts at Chevy High Performance Magazine.

Hei Module Symptoms: Rough Idle, Pinging, Poor Performance, Stalling When one part of the HEI module fails, the engine has no spark and does not run.

The HEI Distributor has been a standard in the world of stand-alone electronic ingitions since 1974. We give our HEI Distributor a tune-up in the February 2013 issue of Car Craft Magazine.

The HEI distributor is an inductive-discharge-style ignition, but with the points replaced by a solid-state switching device called an electronic ignition-control module.