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Adjust the ignition timing

Although the ignition timing is automatically adjusted, it can also be adjusted manually. Preparatory work, such as when adjusting the idle speed for the respective motor. Ignition is adjusted when the engine is idling. For various engines require different work.

Injection engine

The position of individual elements of the fuel injection system and the ignition system in the engine compartment of the car with the engine SR20DE

1 - adsorber 2 - the valve of additional air 3 - injection valves 4 - fuel pressure regulator 5 - throttle position sensor 6 - the fuel filter 7 - switching valve, adjustable idle	8 - the coolant temperature sensor 9 - air regulator 10 - resistor 11 - transistor 12 - ignition coil 13 - crank angle sensor 14 - air flow meter

Before checking and adjustment should be certain conditions are met in order to obtain accurate results, ie. E. Mentioned in Chapter Current leaving and service parts or systems should be checked and adjusted accordingly. No-load speed should correspond to the desired value.

After warming up the engine and connect the tachometer and stroboscope, perform the following work:

PERFORMANCE ORDER

On the engine off get the throttle position sensor (see. and remove the plug. Start the engine. Two or three times to increase the number of revolutions of 2000 - 3000 rev / min and then allow to run for 2 minutes at idle. Read the tachometer. The engine must operate at a speed of 800 rev / min. Read the ignition timing in the strobe beam on the belt pulley of the crankshaft. If the ignition timing is outside the range of 15 ?� 2 ?� before TDC, adjustment is necessary. To do this, loosen the bolts of the distributor (see. and turn the distributor until a correct ignition timing. Under the new regulation should always aim for the exact value of 15 ?�. Again tighten the bolts and check the ignition timing. Finally, reconnect the plug. For vehicles without catalyst timing adjustments are made in the same way. Pulley crankshaft has a notch on the edge to show the adjustment of the ignition timing from the outside. On the cover of the drive camshaft adjustment plate is placed and each division corresponds to 5 ?�. In the depicted mark the moment of ignition.

Carburetor engine

On vehicles with petrol engines work differs depending on whether the catalyst or not.

C catalyst

Before you can check the ignition timing to be performed are listed in Chapter Current leaving and service conditions.

PERFORMANCE ORDER

Warm up the engine, t. E. Arrow remote thermometer should stand in the middle position. When adjusting the engine must maintain an operating temperature, t. E. In the intervals may be necessary to run the engine to warm it up again. The engine must operate at a speed of less than 1000 rev / min. Connect the tachometer and stroboscope according to the instructions. Accelerate two to three times the engine to 2000 - 3000 rev / min and then allow for a minute at idle. Read the idle speed on the tachometer. The engine must operate at a speed of 750 ?� 50 rev / min. If the value is not correct, the idle speed should be pre-adjusted. The necessary work is described in Chapter Current leaving and service. Read the ignition timing in the beam strobe lamp on a belt pulley of the crankshaft. If the ignition timing is outside the limits specified in the Specifications in the beginning of this chapter shall be made adjustment. The illustration below shows where to take readings of the moment of ignition in the beam strobe lamp. View tags ignition timing belt pulley on the crankshaft. The label "0" is indicated in yellow. When adjusting the ignition timing should be adjusted to different values. In the illustration depicted in the spot can be seen mounted pressure sensor gain (on the right side of the car, standing in front of the engine compartment near strut suspension). This device monitors the negative pressure in the intake manifold and sends an electrical signal to an electronic control unit. Since this has an effect on the time of ignition, it must be switched off. To do this, remove the vacuum hose and insert to the end of a bolt of suitable diameter. Position sensor pressure amplifier (1). Loosen the bolts and rotate the distributor valve until the mark "0" and "5" will not be around next to the pointer when the strobe lamp to illuminate them. Retighten the bolts. Put the hose and check the ignition. At this time, the value should be respected in the Specifications in the beginning of Chapter. These data need to carefully examine, as there may be two different distributor of ignition and adjustment are slightly different from each other. Adjust the ignition timing on vehicles without catalyst performed in a similar way.

No catalyst

On the engine without catalyst adjustment is somewhat more complicated, since, depending on the set of the distributor, vacuum hose, or be disconnected from the carburetor and closed, or remains connected. To plug the hose, insert it into the end of the bolt of suitable diameter. More precise instructions are given in the Specifications in the beginning of Chapter. According to them the moment the ignition has different meanings. Otherwise, control is effected in the manner described for catalyst models.