7.7.2. Check of system of ignition
Prevention
Observe the security measures excluding electric defeat. Before connection of devices disconnect ignition.
CARBURETTOR ENGINES WITHOUT CONVERTER
Refusals of ignition are, as a rule, caused by pollution of contacts or breakdown on a surface.
Check of ignition is forbidden by a consecutive detachment of high-voltage wires.
| PERFORMANCE ORDER |
| 1. At start-up refusal first of all check battery tension at inclusion of a starter, having disconnected and having connected a high-voltage wire of the coil to weight. If tension less than 9,5 In, then check the battery and system of a charge. |
| 2. At normal turns of a starter connect a stroboscope and define presence of tension on candles. If flashes of a stroboscope are observed, then it is necessary to check candles. Otherwise check a condition of wires, covers of the distributor, a piece of coal and the runner. |
| 3. If there is a spark, then check the carburetor. |
| 4. In the absence of a spark check tension on a conclusion "+" coils (11,7 B). If voltage below 11 V, then check all power-supply circuit, including a safety lock and connections with weight. |
| 5. If tension normal, then check the ignition coil (resistance of windings, reliability of contacts, especially low-voltage). |
| 6. If the coil is serviceable, then the electronic switchboard is faulty (is checked and under repair in car service). |
| 7. Check the thermal vacuum valve. Disconnect the damping valve and blow, – air has to pass freely from the distributor. |
| 8. If the engine works with interruptions, then check low-voltage and high-voltage chains. |
| 9. Check reliability of contacts and resistance of primary chain. |
| 10. Check a condition of a cover of the distributor, candles (by their mutual substitution), the runner and a piece of coal. |
| 11. Check a stroboscope presence of tension on all candles and wires. |
| 12. In the absence of tension it is necessary to check wires or a cover of the distributor for parts of wires. |
| 13. At total absence of high voltage check the ignition coil. |
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CARBURETTOR ENGINES WITH CONVERTER AND INJECTOR ENGINES
| PERFORMANCE ORDER |
| 1. At failure of the system of ignition it is necessary to check a condition of the air filter, candles, adjustment of a cable of the gate, a compression and gaps in valves. |
| 2. Check of system of ignition of these engines comes down to definition of a corner of an advancing, check of reliability of sockets on the control unit and fastenings of wires. |
| 3. On injector engines it is necessary to use the self-diagnostics mode. |
| 4. If malfunction is not found, then the car should be handed over in service of car service. |
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