Adjusting the timing on a Nissan Sentra requires special tools and a clear understanding of engine mechanics. Changing the timing on a Nissan Sentra makes the car run smoother and provides better gas mileage. The timing on a Nissan Sentra with a distributorless ignition system requires professional reprogramming of the cars computer controls. This guide covers all models of the Nissan Sentra that have a distributor.
Difficulty: Moderately Challenging
Instructions
Things You'll Need
Timing light
Wrenches
1
Locate the crank pulley at the front of the engine and remove any dirt or grime to reveal the timing ignition marks. Start the car and allow it to reach normal operating temperature. Shut the engine off and connect the timing light to the battery of necessary and then to the number one ignition wire at the front driver side of the engine.
2
Start the car and shift into neutral making sure the parking brake is set. Hold the throttle at 2,000 RPM for 2 minutes and turn the engine off. Disconnect the throttle position sensor from the front of the throttle body.
3
Restart the car and race the engine three times for 1 second each. Let the engine idle normally for 1 minute.
4
Point the timing light at the crank pulley to determine the amount of adjustment required. Loosen the bolts on the distributor and turn the assembly until the desired crank timing mark and the middle line of the timing light match.
5
Tighten the distributor and test the timing again to verify the distributor didn't move when tightened. Turn off the engine and remove the timing light. Replace the number one ignition wire.
Tips & Warnings
Failing to adjust the ignition timing properly causes excess engine wear or permanent damage.
Keep hands and tools away from the cooling fan as it cycles on and off during the procedure.
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