### Adjustment

NOTE: Always refer to the underhood specifications sticker for any additional applicable procedures. Identify the type engine in the vehicle, read the service procedure and refer to the correct procedure for your engine.

1. Locate the timing marks on the crankshaft pulley and the front of the engine.
2. Clean off the timing marks, so that you can see them.
3. Use chalk or white paint to color the mark on the crankshaft pulley and the mark on the scale which will indicate the correct timing when aligned with the notch on the crankshaft pulley.

   Fig. 1: Typical timing indicator to pulley relationship

   Fig. 2: Timing marks

   Fig. 3: Engine and emission parts location — 200SX (CA20E engine)

   Fig. 4: Engine and emission parts location — 200SX (VG30E engine)

   Fig. 5: Throttle harness connector location — Stanza (KA24E engine)

   Fig. 6: Throttle harness connector location — 240SX (KA24E and KA24DE engines)

   Fig. 7: Ignition timing marks

   Fig. 8: Loosen the distributor lock-bolt and turn the distributor slightly to adjust timing

4. Attach a tachometer to the engine.
5. Attach a timing light to the engine, according to the manufacturer's instructions. If the timing light has three wires, one, usually green or blue, is attached to the No. 1 spark plug with an adapter. The other wires are connected to the battery. The red wire goes to the positive side of the battery and the black wire is connected to the negative terminal of the battery.
6. Check that all of the wires clear the fan, pulleys, and belts, and then start the engine. Allow the engine to reach normal operating temperature.

   NOTE: On 200SX models with the Z22E and CA20E and CA18ET engines and Stanza with the CA20E engine and with a distributor advance vacuum hose stop engine — disconnect distributor advance vacuum hose (if so equipped) from the distributor and plug hose.

7. Check or adjust the idle speed (using correct procedure) to the correct setting. See the Idle Speed service procedures in this section.
8. Aim the timing light at the timing marks. If the marks which you put on the pulley and the engine are aligned when the light flashes, the timing is correct. Turn off the engine and remove the tachometer and the timing light. If the marks are not in alignment, proceed with the following steps.

   NOTE: On 200SX and Stanza models with a CA20E engine and no distributor advance vacuum hose stop engine — disconnect auxiliary air control (A.A.C.) valve harness connector which is part of idle air adjusting unit (I.A.A.) unit and throttle valve switch then follow Step 9.

   NOTE: On 200SX models with a VG30E engine stop engine — disconnect idle up solenoid harness connector then follow Step 9.

   NOTE: On 240SX and Stanza with KA24E and KA24DE engines stop engine — disconnect throttle sensor harness connector then follow step 9.

9. Loosen the distributor lock-bolt just enough so that the distributor can be turned with a little effort.
10. Start the engine. Keep the wires of the timing light clear of the fan.
11. With the timing light aimed at the pulley and the marks on the engine, turn the distributor in the direction of rotor rotation to retard the spark, and in the opposite direction of rotor rotation to advance the spark. Align the marks on the pulley and the engine with the flashes of the timing light.
12. Tighten the distributor lock-bolt and recheck the timing. Reconnect all lines or electrical connections. Roadtest the vehicle for proper operation.