The Chevy 350 is a popular engine used in many different types of vehicles. One important component of this engine is the HEI distributor. The distributor is responsible for distributing high voltage current to the spark plugs which ignite the fuel and air mixture in the cylinders. Without a properly working HEI distributor, your Chevy 350 may not run at all. In this article, we will discuss the wiring diagram for a HEI distributor on a Chevy 350 engine.
What is an HEI Distributor?
Before we discuss the wiring diagram, it is important to understand what an HEI distributor is and how it works. A HEI distributor stands for High Energy Ignition. This type of distributor was first introduced by General Motors in the 1970s. It is a complete ignition system built into a single unit that is easy to install and maintain. The HEI distributor includes a coil, ignition module, and rotor, all in one housing.
The HEI distributor uses a high voltage coil and an electronic control module to provide a strong spark to the spark plugs. This results in better starting, more power, and improved fuel efficiency. The HEI distributor also has a longer lifespan than traditional distributors due to its design.
Wiring Diagram for HEI Distributor on Chevy 350 Engine
The wiring diagram for HEI distributor on Chevy 350 engine is relatively simple. The distributor has three wires that need to be connected to the ignition module. These wires are the tach signal, the positive wire, and the negative wire.
The first wire that needs to be connected is the tach signal wire. This wire provides a signal to the tachometer indicating the engine speed. The tach signal wire is usually a green wire and should be connected to the tachometer output on the ignition module.
The second wire that needs to be connected is the positive wire. This wire provides power to the ignition system. The positive wire is usually a red wire and should be connected to the positive terminal on the ignition module.
The third wire that needs to be connected is the negative wire. This wire provides a ground for the ignition system. The negative wire is usually a black wire and should be connected to the negative terminal on the ignition module.
Table of HEI Distributor Wiring Diagram
| Wire Color | Description | Connection |
|---|---|---|
| Green | Tach Signal | Tachometer output on Ignition Module |
| Red | Positive | Positive terminal on Ignition Module |
| Black | Negative | Negative terminal on Ignition Module |
Frequently Asked Questions
What is the purpose of an HEI distributor?
The purpose of an HEI distributor is to distribute high voltage current to the spark plugs which ignite the fuel and air mixture in the cylinders. This results in better starting, more power, and improved fuel efficiency.
How do I install an HEI distributor on my Chevy 350 engine?
To install an HEI distributor on your Chevy 350 engine, follow these steps:
- Remove the old distributor from the engine.
- Install the new HEI distributor in the same location as the old distributor.
- Connect the tach signal wire, positive wire, and negative wire to the ignition module.
- Set the initial timing on your engine.
- Start your engine and adjust the timing as necessary.
What are the benefits of using an HEI distributor?
The benefits of using an HEI distributor include better starting, more power, improved fuel efficiency, and a longer lifespan than traditional distributors.
Can I use an HEI distributor on my Chevy 350 engine if it has a points-type distributor?
Yes, you can use an HEI distributor on your Chevy 350 engine even if it has a points-type distributor. However, you will need to make some modifications to your ignition system in order to do so. It is recommended that you consult with a professional mechanic or technician before attempting to make any modifications to your engine’s ignition system.
How do I troubleshoot my HEI distributor if it is not working properly?
If your HEI distributor is not working properly, there are several things you can check. First, check the wiring connections to ensure that they are tight and secure. Next, check the ignition module to make sure that it is receiving power. You can also check the coil and rotor for signs of wear or damage. If you are still experiencing problems, it is recommended that you consult with a professional mechanic or technician.
What is the lifespan of an HEI distributor?
The lifespan of an HEI distributor depends on many factors, including the quality of the components and the amount of wear and tear it experiences over time. However, on average, an HEI distributor can last up to 100,000 miles or more.
