Where is the ignition coil on a HEI distributor?

HEI distributors contained the ignition coil in the top of the distributor cap. The HEI only needed 12V to operate. In the early 1970’s many manufacturers came out with a variety of distributor electronic ignition systems referred to as “DI”. An electronic module replaced the mechanical point style ignition contacts.

What’s the difference between DIS and Cop ignition?

Then, engineers designed fully electronic automotive ignition systems, the first of which was a distributor-less style ( DIS ). Modern automotive ignition systems are referred to as coil-on-plug ( COP ), which in addition to improving spark timing, uses redesigned ignition coils that pack a much bigger wallop and generate a hotter spark.

Is it possible to drive with a faulty coil pack?

It is possible to drive with a faulty Coil On Plug (COP), but not advisable. Driving with a faulty waste spark ignition system won’t be possible. Driving with a faulty coil pack can damage other components of the engine.

What does wasted spark on a coil pack mean?

Coil packs commonly used wasted technology which was first introduced in the mid 80’s. Wasted spark simply means it uses only two coils to fire a four cylinder engine. A six cylinder will have a coil pack containing three individual coils.

The HEI distributor actually houses the ignition coil underneath that massive cap. You will need to purchase a new set to match your new distributor. With that said, reattach your individual plug wires to their proper posts. Take your time and make sure you have them right.

What kind of distributor do I need for a 1979 Mustang?

Start your ignition system off right with a new 1979-1993 Mustang performance distributor from 5.0 Resto. These direct replacement MSD distributors provide your high horsepower Fox Body motor with the spark it needs while giving your engine bay a little bit of style.

How do you wire a HEI ignition switch?

You have to eliminate the “ballast resistor” from the circuit. The easiest way to do it (and the way I did mine) is to find a connection on the back side of the ignition switch that has 12V when the key is in the “start” AND in the “run” position. Make up a 12 gauge wire with an in-line 20 amp fuse.

What’s the best way to wire a HEI distributor?

The easiest way to do it (and the way I did mine) is to find a connection on the back side of the ignition switch that has 12V when the key is in the “start” AND in the “run” position. Make up a 12 gauge wire with an in-line 20 amp fuse.

When did GM start using the HEI ignition system?

It was not until the model year of 1974 that GM offered the new HEI ignition system as an alternative. One year later in ’75, it became standard equipment for all, and with good reason.

Where does the HEI wire come from on a Ford pit stop?

When reconnecting the new unit, you will need to purchase and splice in a single HEI terminal connector. This is your “hot” ignition wire coming from the engine harness. With the ignition coil neatly tucked inside the HEI, it makes the electrical hook-up a cinch.

Where is the ignition coil on a HEI distributor?