TABLE OF CONTENTS Paragraph Page No. SAFETY GUIDELINES.................................................................................................................1 VEHICLE SERVICE MANUALS...................................................................................................2 GENERAL INFORMATION ..........................................................................................................3 ENGINE TIMING AND TUNE-UPS ..............................................................
SAFETY GUIDELINES SAFETY EQUIPMENT SMOKING AND OPEN FLAMES Fire Extinguisher Never smoke while working on your car. Gasoline vapor is highly flammable, and the gas formed in a charging battery is explosive. Keep a fire extinguisher suitable for gasoline/chemical/electrical fires on hand whenever working on a vehicle. BATTERY Fireproof Container Do not lay tools or equipment on the battery.
VEHICLE SERVICE MANUALS Contact your local car dealership, auto parts store, bookstore or public library for availability of service manuals for your vehicle. The following companies publish valuable repair manuals. Write to them for availability and prices. Be sure to include the make, model and year of your vehicle. FACTORY SOURCES Ford/General Motors Service Manuals Helm Inc. 14310 Hamilton Ave.
GENERAL INFORMATION ENGINE TIMING AND TUNE-UPS 4. Proper ignition timing is critical in order to achieve peak engine performance and to ensure maximum fuel economy. An ignition system timing check is critical during any tune-up procedure. Your timing light provides a simple and efficient means of checking your vehicle's ignition timing, and provides the additional ability to check the operation of your vehicle's mechanical or vacuum advance timing controls.
Fig. 1 Timing Light Controls - General 3 4 2 1 14 12 10 13 5 11 12 10 6 7 8 9 USING YOUR TIMING LIGHT BEFORE YOU BEGIN ■ Belts Make a thorough check before starting any test procedure and fix any known mechanical problems before performing any test. Loose or damaged hoses, wiring, or electrical connectors are often responsible for poor engine performance.
WARNING! Fig. 2 Typical Timing Marks Always keep hands, timing light, lead wires and clips away from moving engine parts and hot surfaces. DO NOT SMOKE. 14 BTDC 10 6 0 10 20 30 0 TDC 6 ATDC 1. Turn the ignition off. DO NOT CONNECT THE TIMING LIGHT WITH THE ENGINE RUNNING OR WITH THE IGNITION ON. 2. Clamp the inductive pickup clip around the No. 1 spark plug wire. See Figure 3.
replacement or timing adjustment MAY BE necessary. Fig. 3 Inductive Pickup Clip Connection INDUCTIVE PICKUP #1 SPARK PLUG WIRE 8. Press the Flash Switch. The timing light will stop flashing. 9. Turn the ignition off and disconnect the timing light from the engine. BE SURE to reconnect any vacuum hoses, etc., which were disconnected during the timing check.
■ Checking Mechanical/Centrifugal Timing Advance 1. MAKE SURE the timing light Advance Display shows 0 (zero) degrees. Press the Zeroing Switch if necessary to obtain 0 degree indication. 2. While performing an INITIAL (BASE) TIMING CHECK as previously described, slowly increase engine speed to the manufacturer's specified rpm for mechanical/centrifugal advance, and observe the rotating timing mark for change.
Checking Vacuum/Electronic Retard and Electronic Advance vehicle's service manual for specifications and procedures. A vacuum pump equipped with a vacuum gauge is required to check vacuum retard. The procedures for checking vacuum/electronic retard and electronic advance vary between vehicles and manufacturers. Refer to your TROUBLESHOOTING If the timing light fails to operate or operates erratically, make the following checks: 1.
WARRANTY AND SERVICE have rights which vary from state to state. This manual is copyrighted with all rights reserved. No portion of this document may be copied or reproduced by any means without the express written permission of the Manufacturer. THIS WARRANTY IS NOT TRANSFERABLE. For service, send via U.P.S. (if possible) prepaid to Manufacturer. Allow 3-4 weeks for service/repair.
