SEARCH  Alternator, Distributor, Starter  Alternator  Distributor  Starter Distributors Assemblies and Components Motorcraft® Distributor Assemblies, Distributor Caps, Distributor Cap Housings and Rotors: Are designed and tested to meet Ford engineering specifications for durability and reliability under extreme conditions Feature specially engineered plastic caps that insulate the high voltage from the coil. This prevents electrical interference with the output signal from the distributor to the engine control computer High electrical resistance between contacts keeps high voltage from traveling to two cylinders at the same time and causing backfire Design and product validation testing ensures durability and reliability under extreme conditions Why a Distributor, Cap, Housing or Rotor May Fail Over time, the high voltage generated by the ignition coil may cause burn marks and carbon buildup on the tip of the rotor and/or on the distributor cap contacts. This changes the distance between the rotor tip and the distributor cap contact, changing the energy transfer into the spark plug wire and spark plug Worn breaker points Typical symptoms will relate to engine drivability, like hesitation during acceleration, rough idle, occasional stalling, "check engine" light, etc. Related Components to Check Ignition coil and connections to distributor assembly Distributor rotor Breaker points Spark plugs and spark plug wires Engine timing Motorcraft® Distributor Caps, Distributor Cap Housings and Rotors: Feature specially engineered plastic caps that insulate the high voltage from the coil. This prevents electrical interference with the output signal from the distributor to the engine control computer High electrical resistance between contacts keeps high voltage from traveling to two cylinders at the same time and causing backfire Design and product validation testing ensures durability and reliability under extreme conditions Related Components to Check Ignition coil and cable to distributor Distributor rotor Breaker points Spark plugs and spark plug wires Engine timing Motorcraft® Synchronizer Assemblies: Perform the function of the distributor (makes sure the ignition current is distributed to spark plugs) in a distributorless ignition system Are designed and tested to meet Ford engineering specifications for durability and reliability under extreme conditions Designed specifically to work with Ford, Lincoln and Mercury engines and engine control computers Why a Synchronizer May Fail Extreme use under substandard starting or ignition conditions or from exposure to extreme environmental or driving conditions Assembly may not function properly because of shorts in the engine wiring harness or because the engine control computer is not operating properly Related Components to Check Electrical connections to and from the synchronizer assembly Engine control computer Spark plugs and spark plug wires Engine timing Search all Motorcraft® distributors and components, product numbers and descriptions in the Full-Line Catalog.