The situation when Lada Granta starts the second time, most often indicates a malfunction of the pressure maintenance system in the fuel rail or loss of tightness of the injector valves. When parked for a long time, gasoline flows back into the tank, and the pump needs to try again to pump the line to the operating value of 3.8–4 atmospheres. Ignoring this symptom in the early stages can lead to overheating of the fuel pump, since it runs “dry” at the moment the starter is first briefly turned on.
Owners Lada Granta with 8-valve and 16-valve engines (VAZ-11186, VAZ-21127) encounter a similar problem with enviable regularity, especially in the cold season. It is important to understand that if a car starts only after turning the key again, the system had already generated an error that the ECU could write to memory, even if the Check Engine lamp is not on. Further operation without diagnostics can damage expensive components of the injection system.
Fuel system and check valve diagnostics
The first thing to check is if Granta does not start the first time is the ability of the system to maintain pressure after the ignition is turned off. In a working car, the pressure in the ramp should drop slightly within 20–30 minutes. If the pressure gauge needle drops rapidly immediately after the pump stops, it means the seal is broken. Most often, the culprit is the check valve built into the fuel pump module, which stops blocking the line.
The second likely source of leakage is the fuel injectors themselves. When the shut-off needle becomes dirty or worn, they begin to leak fuel into the cylinders, which leads not only to difficult starting, but also to “overflowing” of the spark plugs. In this case, when starting, you can feel the characteristic smell of unburnt gasoline from the exhaust pipe. For accurate diagnostics, it is necessary to connect a pressure gauge to the fuel rail fitting and monitor the dynamics of the pressure drop after stopping the engine.
Checking fuel pressure is a mandatory procedure. The normal operating pressure for the Lada Granta is 3.6–3.8 bar. If the gauge drops below 3 bar after 10 minutes of parking, look for a leak in the pump or injectors.
It is also worth paying attention to the condition of the fuel filter, which in modern versions Granta often combined with a pump module. A clogged receiver screen creates additional resistance, and the pump does not have enough time during one starter cycle to create the required pressure. Replacing the filter element or purging the system can restore reliable starting on the first try.
Malfunctions of the idle air control and throttle valve
If the fuel system is OK, attention turns to air. Idle air control (IAC) is responsible for supplying air bypassing the closed throttle valve. On the Lada Granta with an electronic gas pedal (E-gas), the role of the IAC is performed by the throttle assembly mechanism itself, but on older versions with a cable drive, the IAC is a separate part. Contamination of the channel or jamming of the rod leads to the fact that the engine does not receive the required amount of air when starting.
Often the problem lies in banal carbon deposits on the throttle valve. Even a thin layer of oily deposits disrupts the opening angle calibration, and the ECU cannot correctly calculate the composition of the starting mixture. As a result, the motor catches, but stalls, requiring a second attempt when the electronics are already making adjustments. Cleaning the unit with special aerosols often solves the problem of unstable startup.
- Visual inspection of the corrugation for cracks
- Checking the operation of the IAC (can you feel vibration on your finger when you turn on the ignition)
- Cleaning the throttle valve
- Checking the tightness of the intake manifold -->
It is also important to consider the condition throttle position sensor (TPS). If its readings “float” or have a dead zone at the beginning of the stroke, the controller receives incorrect data about the position of the pedal. This disrupts the starting algorithm, and the engine can only start after the driver releases the gas pedal for the second attempt. Diagnostics of TPS is carried out with a multimeter or scanner, monitoring the smoothness of voltage changes.
Problems with the ignition system and spark plugs
The third most common factor due to which Lada Granta starts the second time - weak spark. Spark plugs are consumables, and their service life on VAZ gasoline engines rarely exceeds 25–30 thousand kilometers when using average quality fuel. An increased gap between the electrodes or carbon deposits require a higher voltage for breakdown, which the coil may not provide at the first, “cold” start.
The ignition module (coil) on Grants is also prone to overheating and breakdown. Cracks in the coil body or oxidation of high-voltage tips lead to current leakage. In damp weather or after washing the engine, the symptoms intensify: the spark “goes” into the mass, and the mixture in the cylinders does not ignite. Only the second time, when the starter slightly warms up the engine compartment or the breakdown conditions change, does the engine start.
⚠️ Attention: When checking the ignition system, never hold the high-voltage wire or spark plug tip in your hands while cranking the starter. Use a spark gap or an unscrewed spark plug pressed against engine ground to avoid electric shock.
Particular attention should be paid to the spark plug gap. For 8-valve engines it should be in the range of 0.7–0.8 mm, for 16-valve engines - 1.0–1.1 mm. A gap that is too small will result in poor ignition of the mixture, and a gap that is too large will result in misfire under load. Adjusting the gap or replacing spark plugs with original ones (NGK, Denso, Bosch) often eliminates the need to restart.
The influence of temperature sensors and mass air flow sensors
The electronic control unit (ECU) generates a fuel injection command based on sensor readings. The key element here is coolant temperature sensor (DTOZH). If it transmits incorrect data (for example, it tells the ECU that the engine is hot, although it is -20°C outside), the mixture will be too lean for a cold start. The engine will not start the first time until it enriches the mixture according to the emergency algorithm.
The mass air flow sensor (MAF) also plays a critical role. A dirty sensor thread or its malfunction leads to errors in the calculation of cycle filling. On a Lada Granta with Itelm or Avtel controllers, the mass air flow sensor error may not immediately ignite the “Check”, but the starting characteristics will deteriorate significantly. Checking the MAF readings at idle (the norm is 0.9–1.2 V for old sensors or the corresponding values in g/s for new ones) helps eliminate this factor.
How to check DTOZH without a scanner
Remove the connector from the temperature sensor. If, when the connector contacts are shorted to ground (simulating a very low temperature), the engine starts to start more confidently, then the sensor indicates “overheating” and needs to be replaced.
Don’t forget about the phase shifter on 16-valve engines. If the variable valve timing mechanism is stuck in the wrong position, starting the engine will be difficult. Although this happens less frequently than problems with fuel, mechanical timing faults cannot be ruled out when searching for the cause, especially if the car's mileage exceeds 100 thousand kilometers.
Comparison table of causes and solutions
To organize data and quickly troubleshoot problems, it is convenient to use a pivot table. It will help compare symptoms with probable nodes that require intervention.
| Symptom | Probable Cause | Diagnostic method | Solution |
|---|---|---|---|
| It turns for a long time, then starts | Rail pressure drop | Measurement with a pressure gauge after switching off | Replacing the pump or pressure regulator |
| Starts and stalls | IAC or throttle valve | Carbon deposit inspection, rod stroke check | Cleaning the unit, adapting the throttle |
| Troits after launch | Breakdown of the coil or spark plug | Visual inspection of sparks in the dark | Replacing spark plugs or ignition module |
| Poor cold starting | Incorrect DTOZH data | Comparison of scanner and thermometer readings | Replacing the temperature sensor |
Analysis of the table shows that most problems can be solved by replacing inexpensive consumables. However, accurate diagnostics allows you to avoid purchasing unnecessary spare parts. For example, replacing a fuel pump with a faulty DTO will not give any result, but will only devastate the owner’s budget Lada Granta.
Seasonal factors and fuel quality
External factors cannot be ignored. In winter, at temperatures below -20°C, the viscosity of the engine oil increases, increasing the resistance to crankshaft rotation. The starter, especially if the battery is not fully charged, does not develop sufficient speed to suck in fuel reliably. In such conditions, starting the second time may be normal if the battery is old.
Fuel quality also directly affects starting performance. A low octane number or the presence of water in gasoline changes the volatility characteristics of the mixture. Water settling at the bottom of the tank can enter the fuel line and cause the engine to sneeze. Using certified gas stations and high-quality fuel filters minimizes risks.
Condensation in the tank is the scourge of winter. Water freezes in the fuel line or filter, blocking the flow of gasoline. After a short warm-up (the first unsuccessful start), the ice may melt and the car will start. The use of special dehydrator additives helps remove moisture from the food system.
Software failures and ECU adaptation
Modern versions of software for Itelma (I414, I444) and Avtel controllers sometimes contain errors in cold start algorithms. Resetting the ECU adaptations may temporarily solve the problem. This is especially true after replacing the battery or cleaning the throttle body, when the old settings no longer correspond to real conditions.
The adaptation procedure on a Grant with E-gas is carried out without a scanner: you need to turn on the ignition, wait for the fuel pump to finish running, turn off the ignition, and repeat the cycle several times. Then start the engine and let it idle until the fan turns on. If after this Granta it still starts the second time, the problem is hardware in nature.
⚠️ Attention: Do not disconnect the battery terminal to reset errors while the engine is running or immediately after starting. This may result in damage to the ECU or loss of immobilizer calibrations.
In rare cases, it is necessary to flash the controller to a newer version that corrects fuel supply bugs. However, before you get into the “brains”, you need to make sure that the “hardware” is in good working order: spark plugs, filters and sensors. Software treatment will not help if the fuel pump is physically worn out.
Frequently asked questions (FAQ)
Why does Granta start the second time only in winter?
In winter, the oil thickens, the battery capacity decreases and the volatility of the fuel worsens. The combination of these factors requires the starter to run longer to build up pressure and warm up the cylinders. Condensation in the tank is also possible.
Could it be the immobilizer?
Yes, if the immobilizer antenna (the ring around the ignition switch) is faulty or has poor contact. In this case, the ECU may not immediately read the key label and block starting on the first attempt, allowing it on the second.
How often do you need to change spark plugs on a Lada Granta?
The service life of conventional nickel spark plugs is about 20-25 thousand km, iridium spark plugs - up to 60 thousand km. However, when using gas (LPG) or low-quality gasoline, the service life is reduced by one and a half times.
Will flushing the injectors help if the car starts the second time?
It will help if the reason is precisely the leakage of the injectors (they “pouring” on the spark plug). If the problem is a drop in pressure in the rail due to the pump, flushing will not have an effect.
Is it dangerous to drive if the car does not start the first time?
In the short term - not dangerous, but it is a signal of a malfunction. Constant idling of the starter drains the battery, and a rich mixture during unsuccessful starts can wash away the oil film from the cylinder walls, accelerating engine wear.