Does an 1987 Chevy S10 Pickup Have Electronic Ignition?

The 1987 Chevy S10 is a classic compact pickup truck known for its reliability and rugged design. If you own or are considering purchasing one, understanding its ignition system is essential for maintenance and troubleshooting. One common question among Chevy enthusiasts is whether the 1987 Chevy S10 has an electronic ignition system or relies on an older mechanical distributor system.

Yes, the 1987 Chevy S10 pickup does have an electronic ignition system. This feature was introduced in most General Motors (GM) vehicles by the late 1970s to improve fuel efficiency, reduce emissions, and enhance performance. Unlike traditional mechanical ignition systems, the electronic ignition system (HEI – High Energy Ignition) in the S10 offers better spark timing, fewer maintenance requirements, and improved reliability.

In this detailed guide, we’ll explore the electronic ignition system in the 1987 Chevy S10, how it works, common issues, troubleshooting tips, and upgrades you can consider.

Table of Contents

Understanding the 1987 Chevy S10 Ignition System

What Type of Ignition System Does the 1987 Chevy S10 Have?

The 1987 Chevy S10 features GM’s High Energy Ignition (HEI) system. This system was a major advancement from older points-based ignition systems and was widely used in GM vehicles from the mid-1970s through the early 1990s.

The HEI system in the S10 consists of:

Distributor with an internal ignition coil
Electronic ignition module
Magnetic pickup sensor
Rotor and distributor cap
Spark plugs and ignition wires

The key difference between HEI ignition and older ignition systems is the absence of contact points. Instead, it uses a solid-state ignition module, which improves spark efficiency and timing.

Advantages of the HEI System in the Chevy S10

The electronic ignition system in the 1987 Chevy S10 provides several benefits over older mechanical ignition systems:

Higher Voltage Output – HEI distributors deliver up to 45,000 volts, ensuring a stronger spark for better combustion.
No Points Maintenance – Unlike older points-based systems, the HEI module doesn’t require frequent adjustments or replacements.
Improved Reliability – The electronic module prevents common issues like misfiring, poor idle, and stalling.
Better Fuel Economy – More precise ignition timing helps optimize fuel burn, reducing fuel consumption.
Easier Starting – The stronger spark allows for better starts in cold weather.

Common Issues with the 1987 Chevy S10 Electronic Ignition System

Despite being more reliable than traditional ignition systems, the HEI system in the Chevy S10 can still develop problems. Here are some of the most common issues:

1. No Spark or Weak Spark

If your S10 won’t start, the ignition system could be at fault. A weak or absent spark may be caused by:

Faulty ignition module
Worn-out spark plugs or wires
Failed ignition coil
Corroded distributor cap or rotor

💡 Solution: Test the ignition module and replace worn-out components as needed.

2. Engine Misfire or Hesitation

If your S10 sputters, misfires, or hesitates under acceleration, the ignition system might not be delivering a consistent spark. Possible causes include:

Cracked distributor cap allowing moisture in
Failing ignition module
Weak ignition coil

💡 Solution: Inspect the cap and rotor for cracks or carbon tracking. If the ignition module fails, replace it. Also, discover what does a ‘pending’ diagnostic trouble code mean for my car.

3. Hard Starting or No Start

A failed HEI system can lead to a hard-starting condition or a complete no-start. This could be due to:

A worn-out ignition coil
Loose or corroded ground connections
Faulty pickup coil inside the distributor

💡 Solution: Check for 12V power at the distributor and inspect the pickup coil and ignition module.

Troubleshooting the 1987 Chevy S10 Electronic Ignition System

Step-by-Step Ignition System Check

Check for Spark – Remove a spark plug wire, insert a screwdriver, and hold it near a metal surface while cranking. A strong blue spark means the system is working.
Test the Ignition Coil – Use a multimeter to check primary and secondary resistance. If the readings are out of spec, replace the coil.
Inspect the Ignition Module – The module inside the HEI distributor can fail over time. Remove it and test using an ignition module tester.
Examine the Pickup Coil – If your engine cranks but doesn’t fire, the pickup coil inside the distributor could be bad. Test it with a multimeter.
Check for Voltage at the Distributor – The HEI system needs a full 12V supply. If there’s no voltage, inspect the wiring and fuses.

Upgrading the Ignition System for Better Performance

If you want better performance and reliability, upgrading the ignition system in your 1987 Chevy S10 is a great option.

1. Upgrading to a Performance HEI Distributor

Aftermarket HEI distributors offer better timing control, higher voltage, and improved durability. Some popular brands include:

MSD Pro-Billet HEI Distributor
Pertronix Flame-Thrower HEI
Accel Super Coil Distributor

💡 Benefit: These distributors provide better throttle response, improved idle, and higher RPM stability.

2. High-Performance Spark Plug Wires

Upgrading to low-resistance spark plug wires reduces interference and improves spark energy delivery. Recommended wires include:

MSD Super Conductor 8.5mm Wires
Taylor Spiro Pro Wires

💡 Benefit: These wires provide better conductivity and longer lifespan.

3. High-Output Ignition Coil

A high-performance ignition coil improves spark intensity and fuel burn. Recommended options:

MSD Blaster 2 Coil
Pertronix Flamethrower Coil

💡 Benefit: Stronger spark ensures better combustion, increased horsepower, and improved fuel economy.

Frequently Asked Questions

Does the 1987 Chevy S10 use a points-style ignition?

No. The 1987 Chevy S10 uses GM’s HEI (High Energy Ignition) system, which replaces points with an electronic ignition module.

Where is the ignition module located on the 1987 Chevy S10?

The ignition module is inside the HEI distributor, mounted under the rotor.

What causes an HEI ignition system to fail?

Common causes include failed ignition modules, worn-out coils, faulty pickup coils, or corroded distributor caps.

Can I replace the ignition module myself?

Yes! Replacing the HEI ignition module is a straightforward job. Just remove the distributor cap, unplug the module, and replace it with a new one.

Is it worth upgrading the ignition system on a 1987 Chevy S10?

Yes! A high-performance ignition coil, wires, and HEI distributor can improve fuel efficiency, horsepower, and throttle response.

Conclusion

The 1987 Chevy S10 pickup does have an electronic ignition system. Its HEI system provides better reliability, stronger spark, and minimal maintenance compared to older mechanical systems. Whether you’re troubleshooting ignition problems or considering performance upgrades, understanding this system ensures that your S10 runs smoothly and efficiently for years to come.

If you’re looking to upgrade your S10 ignition system, consider a performance HEI distributor, high-output coil, and premium spark plug wires for improved performance and longevity.