Repair 7

1993 Toyota Corolla Timing Specs

Correct ignition timing specifications are crucial for engine performance. Timing affects many variables, including fuel economy and engine longevity. Corolla is one of the most popular compact cars that was first introduced in 1966 and produced by Japanese automaker Toyota. Its engineers have determined precise timing specifications so that you can benefit from your Corolla as much as possible.

Measuring Ignition Timing

Use a timing light to check your timing while the engine is running. An inductive trigger signal will be picked up from one of the spark plug cables, causing the light to turn on and freeze while the spark plug fires. This helps to determine the crankshaft position. Use this information for making timing adjustments because the rate at which the crankshaft is spinning and is processed by the distributor controls the ignition (that is, controls when the spark should occur).

Timing Specifications

Ideally, the time at which the mixture should be fully burned on a Toyota Corolla is approximately 10 degrees before top dead center (BTDC) at 700 rpm.

Notes

Maximum RPM is not allowed. Cooling fan and vacuum advance (if equipped) should be turned off while adjusting the ignition timing.