What Does A Spark Plug Do
Spark plugs can make or break your engine’s performance. Understand how they work, how to recognize a faulty one, and get expert advice on choosing the right spark plug for better engine health.
Jul 21, 2026
Add your vehicle
Address
Login
Cart
Item
$0.00
Add your vehicle to ensure fitment/Choose a yearRequired Fields
Select a different vehicle
Make/Model
VIN
Save
AMC Spark Plug Wire
23 itemsMisfires, rough idle, or weak acceleration can start with aging ignition wires. Replace your spark plug wires set to help deliver steady spark and restore smoother engine performance.
- All filters
- Sort By
- Year
- Model
- Price
- Brand
- Color
- Warranty
Walker ProductsPart # 924-1658
Walker Products 924-1658 Spark Plug Wire Set
4.73 Reviews
$45.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1975-1975 International 150, 1975-1975 International 200, 1975-1975 International MS, 1975-1975 International Scout II, 1974-1974 Chevrolet Corvette, 1974-1974 Chevrolet El Camino, 1974-1974 Chevrolet Impala, 1974-1974 Chevrolet Monte Carlo, 1974-1974 GMC Sprint, 1974-1974 International 100, 1974-1974 International 100, 1974-1974 International 100, 1974-1974 International 200, 1974-1974 International 200, 1974-1974 International 200, 1974-1974 International 200, 1974-1974 International MHC1310, 1973-1974 American Motors Javelin, 1973-1974 American Motors Javelin, 1973-1974 Chevrolet Bel Air
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: AMC
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1658, 35-8101, 35-8331, 35-8315, 2821, 9142, 102, 3129,
...View moreitem #1001PNX2
Show less
DensoPart # 671-8044
Spark Plug Wire Set - Denso 671-8044
51 Reviews
$49.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1984-1986 Jeep Grand Wagoneer, 1979-1979 American Motors Spirit, 1978-1979 American Motors AMX, 1978-1979 American Motors Concord, 1978-1979 American Motors Pacer, 1977-1986 Jeep J20, 1976-1981 Jeep CJ7, 1976-1976 Jeep J20, 1976-1976 Jeep J20, 1975-1983 Jeep Wagoneer, 1975-1981 Jeep CJ5, 1975-1978 Jeep Wagoneer, 1975-1977 American Motors Hornet, 1975-1977 American Motors Matador, 1975-1976 American Motors Gremlin, 1975-1975 Jeep CJ6, 1975-1975 Jeep J20, 1974-1986 Jeep J10, 1974-1983 Jeep Cherokee, 1974-1978 Jeep Cherokee
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: AMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8044, 35-8142, MSW1914, 6718044, 518F, 508G, 11-865M, 2X1019,
...View moreitem #100316Z8
Show less
Walker ProductsPart # 924-1023
Walker Products 924-1023 Spark Plug Wire Set
4.73 Reviews
$36.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1979-1979 American Motors Spirit, 1978-1979 American Motors Concord, 1977-1978 American Motors Gremlin, 1975-1979 Honda Civic, 1973-1974 Honda Civic
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: AMC
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1023, 35-4014, 8006, 8008, HE31, HE33, 4701, 9226,
...View moreitem #1001PQX0
Show less
What are spark plug wires?
Spark plug wires, also known as ignition cables or spark plug leads, are a set of wires that connect the ignition coil or distributor to the spark plugs in an internal combustion engine. They are responsible for transmitting high-voltage electrical energy from the ignition source to the spark plugs, which ignite the fuel-air mixture in the engine's cylinders.
The spark plug wires typically consist of a central core made of conductive materials such as copper, and an insulating layer made of materials like silicone or rubber to prevent electrical current from leaking. The wires are designed to withstand high temperatures and electrical interference and are often color-coded to ensure correct installation.
Signs of bad spark plug wires
Spark plug wires play a crucial role in ensuring reliable engine performance. Worn or damaged spark plug wires can cause misfires, rough idling, and poor fuel efficiency, so it's important to take regular maintenance and replace them as needed.
Engine knocking
When the spark plug wires fail, the engine may produce a knocking sound, particularly under heavy loads. This can be caused by pre-ignition or detonation, which can occur when the spark plug wires are not delivering enough energy to the spark plugs.
Rough shifting (automatic transmission)
In some cases, a damaged spark plug wire can cause rough shifting in an automatic transmission. This can be due to a drop in engine power caused by misfires or other problems related to the spark plug wires.
Burned spark plug wires
If you notice that your spark plug wires are discolored or burned, this can be a sign that they are not functioning properly. Burned spark plug wires can be caused by excessive heat, electrical interference, or other issues.
Poor acceleration
When the spark plug wires are failing, the engine may have trouble accelerating smoothly. This can be due to misfires or other problems related to the spark plug wires.
Stalling
A damaged spark plug wire can cause the engine to stall or cut out, particularly at idle. This can be due to a drop in engine power caused by misfires or other problems related to the spark plug wires.
How to change spark plug wires?
Replacing a spark plug wire set is a relatively simple task, and can usually be completed in under an hour. You can follow these steps:
1. Remove the worn or faulty spark wire set.
To avoid confusion and prevent accidentally switching the wires, it is recommended to replace each spark plug wire individually, starting with the longest one. When removing the wires from either the spark plug or distributor cap, it is important to loosen the connection by twisting or rotating the boot. Yanking or forcefully pulling on the wires may cause them to break. Only pull on the boot and refrain from pulling on the cable.
2. Install the new spark plug wire set
Install the new spark plug wires in the same location as the old wires, making sure to connect each wire to the correct spark plug. If your new spark plug wires have boots, be sure to push the boot firmly onto the spark plug until it clicks into place.
3. Test the new spark plug wires
Once you have installed the new spark plug wires, start the engine and check for any signs of misfires, rough idling, or other problems that could indicate an issue with the spark plug wires. If everything looks good, you're all set!