First you need to determine the cause of failure. As a rule, to start the engine needs fuel, air and spark that will ignite the air-fuel mixture in the engine cylinders. If the air filter is in order and the mixture of fuel and air enters the intake manifold, it's time to check the ignition system. To test the spark alone can and should not delay this process "indefinitely", but rather to the visit to the station.
Verification is the following: with the help of candlestick key, you must remove the spark plugs from heads of cylinder blocks and carefully to see them. The first thing you need to pay attention to is the gap between the center and side electrodes. It needs to match the values from 0.7 to 0.9 mm. If the clearance is more, it is necessary to bend the side electrode if it is less to bend. Also pay attention to the condition of the candle: soot can also tell you about the operation of the engine. To check the spark Nagar should be removed using fine emery paper.
To conduct an audit independently, you can link all the candles are wired in series and the free end of the wire to ground to ground of the car, put on the plugs tips of high-voltage wires. Then, using the starter start to spin the engine and observe the spark between the electrodes. Its appearance and color also can be very telling. If spark is weak on all the candles or none at all, it is likely failed electronic switch. If the spark is there, but on all or on a candle, it is different, the problem may be the following:
- the breakdown of the high voltage wire from the distributor to the spark;
- runner distributor (distributor) has a defect or production;
- faulty spark;
- intermittent contact with the tip wire.
If you were able to candle light to check spark on their own and as a result of verification to establish that it is not possible at the same time to test and work the ignition coil. For this you need to install on one of the spark gap of 2-4 mm and crank the engine. If this spark sparks also is not, then the ignition coil is faulty. In cars with a carburetor engine it is enough to replace, whereas in cars with injector injection system must be inspected and electronic switch that can fail.