1. Start the engine on the Lada Kalina car and leave it to idle. Go to the muffler exhaust pipe and listen for the sound of the exhaust. You can bring your hand to the cut of the exhaust pipe of the muffler - so interruptions in the engine are felt better. The sound must be even «soft», one tone. Pops from the exhaust pipe of the muffler at regular intervals indicate that one cylinder is not working due to the failure of the candle, the absence of a spark on it, the failure of the nozzle, a strong air leak into one cylinder or a significant decrease in compression in it. Popping at irregular intervals is due to dirty injector nozzles, heavy wear or dirty spark plugs. If pops occur at irregular intervals, you can try to replace the entire set of candles yourself, regardless of mileage and appearance, but it is better to do this after contacting a car service for computer diagnostics and repair of the engine control system.
2. If the pops from the exhaust pipe are regular, turn off the engine on the Lada Kalina car and open the hood. Check the condition of the ignition wires. The insulation of high-voltage wires must not be damaged, and the tips of high-voltage wires must not be oxidized. If there is damage to the high voltage wires, replace the defective wire.
3. Remove the tips of high voltage wires.
Attention! When removing high voltage wire lugs, never pull on the wire. Grasp the handpiece directly on the handpiece and, turning it from side to side, pull.
4. Remove the spark plugs with a spark plug wrench.
5. Carefully inspect the spark plugs and compare their appearance with the photographs below. The gap between the electrodes of the spark plug should be 1.0-1.13 mm. If the spark plug is black and damp, it can be discarded.
6. If all spark plugs look good, reinstall them and reconnect high voltage wires. The order of operation of the cylinders: 1-3-4-2; cylinder numbering (1st, 2nd, 3rd, 4th) is driven from the engine crankshaft pulley.
7. Get a spare spark plug. Fix it to the engine in any way.
Attention! Do not fix the spark plug on the oil filler neck, oil dipstick, fuel pump, fuel hoses.
Reliable contact of the body or threaded part of the spark plug with «weight» optional, but desirable. Connect the high voltage wire from cylinder 1 to the spare spark plug. Start the engine on the Lada Kalina car. If engine interruptions do not increase, replace the spark plug in the 1st cylinder with a good one. Put on the high voltage wire and start the engine. If interruptions have intensified, repeat the procedure of step 7 sequentially with all cylinders to identify a faulty spark plug.
If, as a result of the measures taken, interruptions in the operation of the engine have not been eliminated, contact a car service for computer diagnostics of the ignition system at the stand or engine diagnostics - compression measurement. Normal compression - more than 1.1 MPa (11 kgf/sm.kv.), the difference is more than 0.1 MPa (1 kgf/sm.kv.) in one cylinder indicates the need for engine repair on a Lada Kalina car.