Gm Hei 4 Pin Ignition Module Wiring Diagram

That way if the msd box fails it would only require a few simple wiring connections to hook up the hei module.

Gm hei 4 pin ignition module wiring diagram. Most of the original gm v 6 and v 8 models used an ignition coil inside the distributor cap making it a one piece ready to run distributor. It reveals the elements of the circuit as simplified shapes and the power as well as signal links between the tools. It is recommended only for ordinary lawn garden equipment. Each part should be set and connected with different parts in specific manner.

Hei ignition systems are very dependable and offer great performance on a number of applications. If not the arrangement will not function as it ought to be. There s a 5 pin hei module specifically designed to listen to a knock sensor which would simply have to be mounted and its wire connected to the relevant hei module pin. This ignition system operates with full 12 volts.

This is a thoroughly tested researched and proven reliable ignition system invented by brian miller for ordinary lawn garden engines and competition pulling engines. In fact msd makes a slick wiring adapter to convert your distributor to the small two pin msd connector. Then even with a cd ignition in the car you can also keep that small aluminum hei module plate as a backup. I read on another forum that some gm v8 vehicles e g.

The diagram above is typical of the early hei using 4 pin ignition module and vacuum advance non est 1974 1980. If you have an amc a ford or a chrysler distributor with a magnetic pickup it s really easy to convert to a standard four pin gm hei module. Variety of gm hei distributor wiring schematic. This electronic ignition system operates with full 12 volts.

If the ignition module any ignition module is starved for power it ll work unreliably and it ll die prematurely. Gm 4 pin hei electronic ignition control module wiring connections diagram with a magnetic pickup coil. Gm 4 pin hei electronic ignition control module wiring connections diagram with the cube shaped 3 wire inductive proximity sensor. We ve included a simplified wiring diagram to show.

Basic hei operation electronic spark control the ecm uses other electronic devices to help control the spark timing under various conditions such as under load deceleration etc. 1986 gmc 350ci pickup had 5 pin ignition modules instead of 4 pin modules.