The situation is familiar to many: you turn the ignition key, the starter turns, but the engine does not catch. On the second try - the same result. And only after the third (or even fourth) time does the engine finally start. This problem is not just annoying - it signals a malfunction, which over time can lead to serious repairs.
In 80% of cases they are to blame fuel system, ignition or battery, but there are also less obvious reasons - from immobilizer glitches to sensor wear. In this article we will look at all possible scenarios, we will teach you to distinguish “harmless” symptoms from critical ones and give a clear algorithm of actions. Spoiler: in half of the cases the problem can be fixed on your own without contacting service.
It is important to understand: if the car starts the third time regularly, this is not a “feature” of your car, but diagnosis. Ignoring it will lead to the fact that one day the engine will not start at all - for example, in winter on the highway or in a traffic jam. We have collected the experience of auto electricians and mechanics so that you can pinpoint the cause and take action.
The article is relevant for gasoline and diesel cars of all brands - from VAZ 2110 up to Toyota Camry 2023. We will pay special attention diesel engines, where the problem is often related to fuel equipment, and vehicles with gas cylinder equipment (GBO), where the gas reducer may be to blame.
1. Fuel system: from filter to pump
Let's start with the most common reason - problems with fuel supply. If the engine does not start the first time, but then “cages”, the culprit may be:
- 🔋 Fuel pump — does not create the necessary pressure, especially in “cold” conditions
- 🧻 Clogged filter - passes fuel only after several attempts
- 💧 Water in the gas tank — settles to the bottom and enters the system when the fuel level is low
- 🔧 Injectors — clogged or leaking “in the return” due to wear of the seals
How to check? First test — listen to the operation of the pump when the ignition is turned on. A slight buzzing sound should be heard in the cabin for 2-3 seconds. If there is no sound, the pump is not pumping. If there is sound, but the engine does not start, check the fuel rail pressure (norm for injector: 2.8–4 bar).
Critical symptom: If the car starts only after spinning the starter for a long time (5+ seconds), this is a sign severely clogged filter or dying pump. On diesel engines it gives similar symptoms airing the system — check the tightness of the tubes from the tank to the injection pump.
2. Ignition problems: spark plugs, coils, wires
If fuel flows normally, but the engine “sneezes” and does not start the first time, the ignition system is at fault. There are three main suspects here:
Spark plugs - even if they are “live”, carbon deposits or improper clearance can cause skips. Check: Unscrew the spark plug and inspect it. The normal color of electrodes is gray-brown. Black soot is a sign of a rich mixture, white soot is a sign of a poor mixture. If the spark plug is wet (filled with gasoline), this is 100% the reason for difficult starting when cold.
Ignition coils - often “glitches” when it’s hot or after rain. Symptom: The engine stalls in the first seconds after starting. You can check the coil with a multimeter (primary winding resistance: 0.4–2 Ohms, secondary: 6–15 kOhms).
High voltage wires — cracks in the insulation or oxidized contacts lead to current leakage. How to check: In the dark, open the hood and start the engine. If “sparks” are visible on the wires, it’s time to change them.
How to “burn through” flooded candles without service?
If the spark plugs are flooded with gasoline, do not turn the starter endlessly - this will only make the problem worse. Instead:
1. Press the gas pedal all the way and crank the starter for 5–10 seconds. This will shut off the fuel supply and ventilate the chambers.
2. If that doesn’t help, unscrew the spark plugs, dry them with a hairdryer or on the stove (do not overheat!), clean off carbon deposits with a brush and screw them back in.
3. Start the engine with the gas pedal depressed - this way the mixture will be leaner and the chances of starting will be higher.
3. Battery and starter: hidden culprits
A weak battery or worn starter can create the illusion of "starting problems" when in fact it is the culprit. lack of energy. How to distinguish:
- 🔋 Battery: When you turn the key, the dashboard dims, the starter turns slowly. Test: Measure the voltage at the terminals with the engine off (normal: 12.6–12.8 V). If less than 12 V, the battery is discharged.
- 🔄 Starter: if it “sticks” or turns jerkily, the engine will not start even with a good battery. Sign: After several unsuccessful attempts, the starter starts turning normally.
An important nuance for diesel engines: if the battery is weak, glow plugs do not warm up to the desired temperature, and the engine does not start the first time. Check their operation: after turning on the ignition, a light click of the relay should be heard, and after 5–10 seconds another click should be heard (shutdown).
If the starter turns briskly, but the engine does not catch, the problem is definitely not in the battery or starter - look in the fuel or ignition.
Check the voltage at the battery terminals (multimeter)
Inspect the terminals for oxidation
Try to push start the car (for manual transmission)
Listen to the sound of the starter: steady or jerky
Check the voltage at the starter when starting (should be ≥10 V)
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4. Immobilizer and electronics: when the car “does not recognize” the key
Modern cars often refuse to start due to immobilizer faults or other electronic systems. Signs:
- The icon on the dashboard flashes or lights up immo (car with key).
- The starter turns, but the engine does not “catch” - as if the ignition or fuel is turned off.
- The problem appears spontaneously, without connection with the weather or time of day.
What to do:
1. Reboot the system: Remove the key, lock the car, wait 5 minutes, then try again.
2. Check the second key - if the car starts normally with it, the problem is in the chip of the first key.
3. Inspect the immobilizer antenna (usually around the ignition switch). Sometimes it comes off or oxidizes.
On some models (Renault, Peugeot, Citroen) the immobilizer may “glitch” after disconnecting the battery. In this case it is required retraining keys (the procedure is described in the car manual).
If the car does not start after washing or rain, check the immobilizer control unit for leaks. Often water enters through cracks in the seals, causing corrosion of the contacts.
5. Sensors: small parts with big impact
A faulty sensor can “deceive” the ECU, causing it to incorrectly prepare the fuel mixture or adjust the ignition. The main "suspects":
| Sensor | Symptoms of malfunction | How to check |
|---|---|---|
| DPKV (crankshaft position) | The engine does not start at all or starts and immediately stalls | Ring with a multimeter (resistance: 500–700 Ohm) |
| Mass air flow sensor (mass air flow) | Start from 3–5 attempts, floating speed | Disable the sensor - if the car starts, it is faulty |
| DTOZH (coolant temperature) | Difficult to start when hot, fan runs constantly | Compare readings with a thermometer (at 20°C resistance: ~2.5 kOhm) |
| TPDZ (throttle position) | Starts only with the gas pedal pressed | Ring the contacts (resistance should change smoothly) |
The most insidious sensor - DPKV. If it fails, the car may not start at all or may start only once. Sign: there are no errors on the dashboard (the ECU does not see the signal from the sensor and does not detect a fault).
On diesels it causes a similar problem. Camshaft position sensor (CPR). If it is lying, fuel is injected at the wrong moment, and the engine starts only after a few turns of the starter.
6. Features of diesel engines and vehicles with gas equipment
Diesels and cars with gas cylinder equipment (GBO) have their own “sores”, due to which the engine may start the third time.
For diesels main reasons:
- Airing the fuel system (check the tightness of the tubes from the tank to the injection pump).
- Wear of injection pump plunger pairs — the pump does not create the required pressure.
- Faulty glow plugs — the engine starts only after warming up.
For cars with HBO typical problems:
- Incorrect gas reducer calibration — the car starts on gasoline, but does not switch to gas.
- Freezing of condensate in gas lines (relevant in winter).
- Malfunctions in the HBO control unit — the gearbox does not open when starting.
If your car starts on petrol, but not on gas, check:
1. Gas level in the cylinder (may be empty).
2. Tightness of the lines (spray soapy water on the connections - if it bubbles, there is a leak).
3. Setting up the reducer (outlet pressure should be 1–1.2 atm).
On diesel engines with a mileage of >200,000 km, starting problems are often associated with wear of the fuel injection pump. If the pump is “tired”, it cannot quickly build up pressure, and the engine starts only after several attempts.
7. Mechanical problems: compression, timing belt, valves
If all the previous steps did not help, the problem may be mechanical. This is the worst case scenario as repairs are usually expensive. What to check:
- 🔧 Compression in cylinders - if below 10 atm (gasoline) or 25 atm (diesel), the engine will have difficulty starting.
- 🔄 Timing belt/chain — if it jumps 1-2 teeth, the valve timing is disrupted.
- 🚪 valves - if they are clamped or have a lot of play, the mixture does not burn efficiently.
How to diagnose:
- Compression measured with a compression gauge (on a cold engine).
- Timing belt check by marks (removing the cover) or listen - if a “rustle” is heard, it is worn out.
- valves Diagnosed by knocking (when cold) or by measuring gaps.
Warning: If the engine starts with a popping sound in the exhaust pipe, this is a sign jumped timing belt or incorrectly adjusted valves. You cannot drive with such a problem - there is a risk of bending the valves!
If compression is low in only one cylinder, the problem may be a burnt valve or stuck rings. Try pouring 5 ml of oil into the cylinder and repeat the measurement - if the compression increases, the rings are to blame.
What to do right now: step-by-step algorithm
If your car starts on the third try, follow this plan:
- Check the battery - voltage, terminals, battery condition.
- Inspect the candles — unscrew one and check the carbon deposits, clearance, and humidity.
- Listen to the fuel pump - Should buzz when the ignition is turned on.
- Try starting with the gas pedal depressed — if it starts, the problem is in the rich mixture (it floods the spark plugs).
- Connect diagnostic scanner (or reset the errors by disconnecting the battery for 10 minutes).
If the problem persists after these steps, take the car for diagnostics. Especially if:
- The engine stutters after starting.
- Errors appear on the dashboard Check Engine or ESP.
- The problem gets worse over time.
Never ignore a difficult start if it is accompanied by a metallic knock, smoke from the exhaust pipe or loss of power - these are signs of serious malfunctions!
The car starts the third time only when cold. What is the reason?
Most likely to blame spark plugs (fills with gasoline) temperature sensor (ECU is lying) or fuel pump (does not create pressure immediately). Check on diesels glow plugs - they may not warm up the combustion chambers.
After refueling, the car began to start 3-4 times. What to do?
You've probably refueled bad gasoline (low octane number or impurities). Drain the fuel or dilute it with quality fuel (fill half a tank of 98). If the problem persists, check fuel filter - it could become clogged with sediment.
The car starts the second time only after washing. Why?
Water got into electrical connections (coils, wires, control unit). Dry the engine compartment with a hairdryer or leave the car in a warm garage overnight. Check tightness of high-voltage wires and sensor connectors.
On gas the car starts the third time, on petrol it’s fine. What's the matter?
The problem is gas reducer or HBO control unit. Possible reasons:
- The gearbox does not warm up to operating temperature.
- The gas injectors are clogged.
- Gas pressure set incorrectly (too low).
Contact the HBO installation service for diagnostics.
Is it possible to drive if the car starts the third time?
Short term - yes, but it's not worth the risk. If the problem is in the spark plugs or battery, you risk one day not starting at all. If the sensors or fuel system are to blame, you can “finish off” the catalyst or filters. Maximum 1-2 trips before diagnosis!