How to Adjust the Timing in a 1993 Toyota Camryby Lee Sallings
The term ignition timing refers to the position of the crankshaft (measured in degrees of rotation) when the number one spark plug it fired to ignite the air/fuel mixture in the cylinder. Adjusting the timing in your 1993 Toyota Camry as part of a tune up will compensate for engine wear that causes small changes in the ignition timing that cause poor fuel economy and loss of power. The average home mechanic will take about 30 minutes to complete this project.
Warm the engine to normal operating temperature. Turn off the engine. Jumper the terminals labeled "T" and E1 in the diagnostic connector using an unfolded paper clip. The diagnostic connector is a small rectangular box located in the driver side of the engine compartment near the ignition coil.
Attach a timing light to the battery terminals and the number one spark plug wire. In the 1993 Camry the number one spark plug wire is the closest to the passenger side fender. Start the engine.
Point the timing light at the timing marks on the front of the engine's timing cover and note the position of the notch on the crankshaft pulley below it. Loosen the 12mm distributor nuts using a wrench. Rotate the distributor to set timing at 10 degrees BTDC by lining up the 10 degrees mark with the notch on the pulley.
Tighten the distributor nuts and turn off the engine. Remove the timing light and paper clip before test driving.
Things You'll Need
- Timing light
- Wrench set
- Wear safety glasses and work gloves when working around a running engine to prevent serious injuries.
Lee Sallings is a freelance writer from Fort Worth, Texas. Specializing in website content and design for the automobile enthusiast, he also has many years of experience in the auto repair industry. He has written Web content for eHow, and designed the DIY-Auto-Repair.com website. He began his writing career developing and teaching automotive technical training programs.