Adjustments are made and parts are replaced ONLY if engine performance is not within specifications. A tune-up consists essentially of checking engine operation with Original Equipment Manufacturer's specifications. With reference to today's "self-tuning" vehicles, the meaning of the term "tune-up" has changed significantly. Your supplier offers a wide range of tools and equipment necessary to perform these tasks. You may also need tools and equipment to check engine rpm, breaker point dwell (for conventional ignition systems), or to apply vacuum to the vacuum advance diaphragm on the distributor during advance checks. The advance timing light provides the additional ability to check the operation of your vehicle's mechanical or vacuum advance timing controls. Your timing light provides a simple and efficient means of checking your vehicle's timing. An ignition system timing check is critical during any tuneup procedure. Proper ignition timing is critical in order to achieve peak engine performance and to ensure maximum fuel economy. OBSERVE ALL SAFETY PRECAUTIONS WHENEVER WORKING ON A VEHICLE. ALWAYS refer to the Vehicle Emission Label or service manual for your vehicle to obtain the proper timing procedures, specifications, and location of timing marks. Timing procedures vary from vehicle to vehicle. Telephone (800) 782-4356 NON-FACTORY SOURCES FACTORY SOURCESįord/GM/Chrysler/Honda/Isuzu/Hyundai/ Subaru Service Manuals Helm Inc. Be sure to include the make, model and year of your vehicle. Write to them for availability and prices. The following companies publish valuable repair manuals. Never crawl under car or run engine while vehicle is on a jack.Ĭontact your local car dealership, auto parts store, bookstore or public library for availability of service manuals for your vehicle. The jack supplied with the vehicle should be used only for changing wheels. When handling ignition wires while the engine is running, use insulated pliers to avoid a shock. High voltage is present in the ignition coil, distributor cap, ignition wires and spark plugs. When working in a garage or other enclosed area, the external battery should be located at least 18 inches above the floor to minimize the possibility of igniting gasoline vapors. When operating any test instrument from an external battery, connect a jumper wire between the negative terminal of the external battery and ground on the vehicle under test. It can burn holes in your clothing and burn your skin or eyes. Accidentally grounding the battery's positive (+) terminal can shock or burn you and damage wiring, the battery or your tools and testers. Gasoline vapor is highly flammable, and the gas formed in a charging battery is explosive.ĭo not lay tools or equipment on the battery. Escaping coolant under pressure can cause serious burns. Never remove the radiator cap while the engine is hot. Make sure that your car is in Park or Neutral, and that the parking brake is firmly set.Īvoid contact with hot surfaces such as exhaust manifolds, pipes, mufflers, radiator and hoses. If vehicle is in an enclosed area, exhaust should be routed directly to the outside using a leakproof exhaust hose. DO NOT wear loose clothing or jewelry when working on a vehicle.ĪLWAYS operate vehicle in a well-ventilated area. Wear safety goggles when working on a vehicle to protect your eyes from battery acid, gasoline, and airborne dust and dirt from moving engine parts.īe very careful not to get your hands, hair or clothes near any moving parts such as fan blades, belts and pulleys or throttle and transmission linkages. Allow soaked rags to dry thoroughly in open air before discarding. Store rags and flammable liquids only in fireproof containers. Keep a fire extinguisher suitable for gasoline/chemical/electrical fires on hand whenever working on a vehicle. INNOVA 3551, 3555 - Inductive/Advance Timing Light Manual
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