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MasterPro Ignition Distributor Cap - 2-40011
- Part #:
- 2-40011
- Line:
- MPI
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Although distributors are not common in modern vehicles, a distributor cap on older model vehicles connects the spark plug wires and distributor, and also protects your distributor's internal components. Distributor caps feature metal contact points on the underside, and when they are contacted by the rotor, this links the ignition coil's voltage to the proper spark plug to provide the power needed to create a spark. This is timed appropriately to ensure the rotor connects power to the spark plug at the appropriate time for combustion. With time, a distributor cap and its contacts may wear and fail under the stress of constant exposure to high voltage. If the distributor cap's contact points are worn down enough, it may not contact the rotor consistently, which can cause misfires or failed starts. The distributor cap may also be damaged or crack, which can allow moisture into the distributor housing and lead to corrosion or other damage. If you notice trouble starting your vehicle, a tapping, sputtering, or clicking sound, or engine misfires, check your spark plugs, wires, distributor cap, and distributor rotor for signs of wear, and replace these parts if needed. Distributor cap and rotor replacement are also often considered part of a regular tune-up, along with replacing the spark plugs and spark plug wires, and a tune-up can often restore performance and efficiency. When you're ready for a tune-up or ignition repair, O'Reilly Auto Parts carries spark plugs, ignition coils, and replacement distributor caps and rotors, as well as the tools and supplies you may need to get the job done. Unsure where to start with your DIY ignition repairs or simply want to learn more? Explore our How-To Hub for information from what causes engine misfires to how to choose spark plugs to help you perform a confident, lasting ignition repair.