![]() The proper alignment will be specified in the vehicle service manual.With the light flashing, observe the relationship of the timing marks.The flashing will “freeze” the timing marks for viewing.This will cause the light to flash in sync with the number one cylinder firing. With the light aimed at the pulley, pull the trigger on the timing light.Hold the light about 6 inches away from the pulley for best visibility.With the engine running at the specified rpm, aim the timing light at the crankshaft pulley timing marks.Set the engine speed to the rpm specified by the manufacturer, usually around 1500 rpm.This allows the ignition timing to advance properly. Start the engine and allow it to reach full operating temperature.The timing pointer is on the timing cover with a scale of degrees.Use chalk or white paint to make the marks more visible if needed.The timing marks are located on the crankshaft pulley and timing cover.For battery powered timing lights, ensure it is fully charged before use. ![]() Use care not to connect to the wrong polarity or short the leads. Next, connect the timing light battery clips to the vehicle’s battery.This wire transmits the signal to the timing light trigger. First, connect the inductive pickup on the timing light to the number one spark plug wire.Using a timing light is an essential tool for correctly setting ignition timing on internal combustion engines.įollow these steps to properly use a digital timing light to check and adjust ignition timing on your engine: 1. How to Use a Digital Timing Light on an Engine With this comprehensive overview, you’ll understand exactly how to use a digital timing light for accurate ignition timing on any engine. Tips for usage along with summaries on what a timing light is, why timing is critical, how digital timing lights work, and the benefits of digital over analog timing lights are also discussed in detail. Repeat steps 4-6 until the timing is correct.Aim the timing light at the timing marks.Connect the timing light to the vehicle.Here is the step-by-step process for utilizing a digital timing light to check and set timing. Using a digital timing light allows you to visually inspect and adjust timing by synchronizing a strobe light flash with cylinder firing. A digital timing light is an essential tool for correctly setting and optimizing ignition timing on an internal combustion engine.
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