Chevrolet Impala Ignition Control Module Guide (1980-1986)
Understanding common failures and choosing the right replacement ignition module for your 1980-1986 Impala.
- A failing ignition module on a 1980-1986 Impala typically causes heat-related stalling and no-start issues.
- Replacing the module is an easy DIY job, but you MUST use thermal paste to prevent the new part from failing.
- For reliability, choose a quality aftermarket brand like Delphi or Standard Motor Products.
- Consider replacing the ignition coil at the same time, as a bad coil can damage the new module.
Symptoms of a Failing Ignition Control Module
A bad ignition control module in a 1980-1986 Impala often causes problems that are sensitive to heat. The module gets hot during normal operation, and over time, this heat can cause it to fail. You might notice that your car runs fine when it's cold but starts to have problems after it warms up.
- Engine Stalling: The most common symptom is the engine stalling unexpectedly after it has warmed up. It might start up again after it has had time to cool down.
- No-Start Condition: Your Impala may crank but refuse to start. This can happen intermittently or become a permanent problem. You may have a very weak spark or no spark at all.
- Misfiring and Rough Idle: The engine may run poorly, misfire, or idle roughly, especially once it's hot. This can feel like the engine is stumbling or hesitating.
- Loss of Power: You might feel a noticeable drop in engine power and acceleration.
Heat is the Enemy
Ignition module failure is almost always related to heat. Bad electrical connections, a failing ignition coil, or high-resistance spark plug wires can make the module work harder and get hotter, leading to premature failure. This is why using the special thermal paste during installation is critical.
Choosing the Right Aftermarket Module
For a vehicle from this era, original AC Delco parts are often preferred by enthusiasts but can be hard to find. However, today's aftermarket offers several good options that meet or exceed original quality. The key is to choose a reputable brand.
Brand Quality Tiers
- OEM-Grade (Delphi, Standard Ignition): Delphi was an original equipment (OE) supplier for GM and is known for quality parts that fit and function like the original. Standard Motor Products (SMP) is another well-respected brand in the aftermarket with a long history of making quality ignition components. For SMP, their standard red box or premium lines are generally recommended over their budget "T-series" line.
- Performance (Accel, Proform): Accel is a long-standing performance brand. Some users report good results and improved throttle response, while others have experienced early failures. Proform also offers performance-oriented modules, but user reviews suggest their quality can be inconsistent. These may be a good choice for modified engines but might be unnecessary for a stock Impala.
Don't Forget Thermal Paste!
When you install your new ignition module, you MUST apply a thin layer of the included dielectric grease or thermal paste to the metal bottom of the module. This paste helps transfer heat away from the module to the distributor body. Skipping this step will cause the new module to overheat and fail very quickly.
Cost of Replacing an Ignition Control Module (1980-1986 Impala)
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Module | $48.75 - $98.14 |
| Shop Labor | $75 - $150 |
| Total Estimated Cost | $123.75 - $248.14 |
Cost estimates are for informational purposes only and may vary based on your location and specific vehicle.
Frequently Asked Questions
Is replacing the ignition module a DIY job?
Yes, this is a very DIY-friendly job for someone with basic tools. The module is inside the distributor. The process involves removing the distributor cap and rotor, unplugging the old module, unscrewing it, applying thermal paste to the new one, and reinstalling everything. It typically takes less than an hour.
Are there any recalls for this part?
No, there are no specific recalls from the NHTSA for the ignition control module on the 1980-1986 Chevrolet Impala. Recalls for this model year range focused on other issues like brakes and accelerator cables.
Should I replace the ignition coil at the same time?
It's a good idea, especially if your coil is old. A failing ignition coil can overwork and destroy a new ignition module. Since you already have the distributor cap off, replacing the in-cap coil is an easy extra step that adds peace of mind.
What tools do I need for the replacement?
You will need basic hand tools, including a screwdriver (often a Phillips head) and possibly a small nut driver or socket to remove the module's mounting screws. You will also need the thermal paste that comes with the new module.
Technical Specifications
OEM Part Numbers: D1906
4-pin HEI Module
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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