Chevrolet Impala Distributor Ignition Pickup Guide (1974-1985)
Diagnosing and replacing the ignition pickup in your Impala's HEI distributor.
- A failing ignition pickup is a common cause of stalling when hot or a no-start condition in HEI distributors.
- Test the part with an ohmmeter; a healthy coil should read between 500 and 1500 ohms.
- Replacement is moderately difficult; if you remove the distributor, you must mark its position to preserve timing.
- Choose a quality aftermarket brand like Delphi or Standard Ignition; avoid unbranded parts for this critical component.
Signs of a Failing Ignition Pickup
The ignition pickup is located inside the distributor, where it gets very hot. Over time, the small wires inside it can break down from heat and vibration. This often causes problems that come and go, making them tricky to diagnose. When your Impala's pickup coil starts to fail, you will notice serious engine problems because it controls the spark for all cylinders.
- Engine Stalls and Dies: The most common symptom is the engine stalling after it has warmed up. It may not restart until it cools down completely. This happens because heat causes the broken wires inside the coil to separate, cutting the signal.
- No-Start Condition: The engine will crank over but will not start. This can be an intermittent problem or a complete failure. You will have no spark at the plugs.
- Engine Misfires or Rough Running: The engine may run poorly, shake, or hesitate. The movement of the vacuum advance can wiggle the failing wires, causing an erratic signal and inconsistent spark.
- Backfiring: An incorrect signal from the pickup coil can cause the ignition timing to be erratic, leading to backfiring through the carburetor or exhaust.
Choosing the Right Aftermarket Pickup Coil
For a classic car like the 1974-1985 Impala, new original GM or ACDelco parts are generally not available. You will be choosing from new aftermarket brands. The two most common and reputable options are Delphi and Standard Ignition (Standard Motor Products).
Brand Quality Comparison
| Brand | General Assessment |
|---|---|
| Delphi | Delphi has a long history as an original equipment manufacturer (OEM) for General Motors. While many of their parts are now made globally, they are generally considered a reliable, high-quality aftermarket choice that aims to meet original specifications. |
| Standard Ignition (SMP) | Standard Motor Products is a well-respected aftermarket company that has been around for decades. They are known for producing quality ignition components. Some mechanics and forum users have noted that quality can be inconsistent on some product lines, but their standard red box parts are considered a dependable option. |
Pro Tip: Both Delphi and Standard Ignition are solid choices for your Impala. The quality difference between them for this specific part is likely minimal. Avoid generic, unbranded "economy" parts, as ignition components are critical for reliability. Given the moderate difficulty of replacement, it is better to use a quality part and not have to do the job twice.
Typical Repair Costs
The cost for a new aftermarket distributor ignition pickup for a 1974-1985 Impala is affordable. The main cost of a professional repair will be the labor, as the part is located inside the distributor.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Part | $28.95 - $77.02 |
| Shop Labor | $150 - $300 |
Frequently Asked Questions (FAQ)
Are there any recalls for the ignition pickup on my Impala?
No. There are no recalls or Technical Service Bulletins (TSBs) from the NHTSA for the distributor ignition pickup on the 1974-1985 Chevrolet Impala. There was a major GM recall for the ignition switch on much newer 2000-2005 Impalas, but that is a completely different part and does not apply to your vehicle.
Can I replace the ignition pickup myself?
If you have experience working on ignition systems, this is a DIY-feasible job. It requires removing the distributor cap, rotor, and ignition coil to access the pickup. Some mechanics prefer to remove the entire distributor from the engine to work on it on a bench. If you do this, you MUST mark the position of the distributor and rotor carefully before removal to ensure the ignition timing is correct when you reinstall it. For beginners, this job is likely too complex and should be left to a professional.
What's the difference between the ignition pickup and the ignition coil?
They work together but do very different jobs. The ignition pickup (or pickup coil) is a sensor that creates a low-voltage signal to tell the ignition module when to fire. The ignition coil is a transformer that takes 12 volts from the battery and turns it into the 40,000+ volts needed to create a spark at the spark plugs. On your HEI distributor, the ignition coil sits on top, while the pickup coil is located underneath it, deeper inside the distributor.
How do I test my old pickup coil?
You can test a pickup coil with a multimeter set to ohms. Disconnect the two small wires coming from the pickup. Touch one probe to each wire. A good pickup coil should show a resistance between 500 and 1500 ohms. If the reading is zero, infinite (OL), or outside this range, the coil is bad. It's also a good idea to wiggle the wires while testing to check for intermittent breaks.
Technical Specifications
OEM Part Numbers: 1977207 D1906
Resistance: 500 - 1500 Ohms
We Have This Part in Stock
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.