The situation is familiar to many owners. Lada Granta with an 8-valve engine: you turn the key, but the car refuses to start. The starter turns, but the engine does not catch on - or there is general silence under the hood. There are dozens of reasons for this behavior, and it’s difficult to understand them without a system. This article will help you identify the root of the problem using elimination, even if you have never held a multimeter in your hands.

We will not list abstract “possible malfunctions”, but will analyze specific symptoms and their connection with the vehicle components. For example, why, when the starter is running, the engine does not start the first time, but can catch on the second - or why, after washing, the car stopped responding to the key. We will pay special attention to “childhood diseases” Grants with 8-valve engine 11183/11186, which appear after 80-100 thousand kilometers.

It is important to understand: the troubleshooting algorithm depends on how exactly the car won't start. The same symptoms may indicate different problems. For example, lack of response to the key and complete silence are more often associated with electrics, and “idling” operation of the starter without starting the engine is with the fuel system or ignition. We have structured the material so that you can quickly jump to your case.

1. Diagnosis based on symptoms: where to start

The first thing to do is record all the details of what is happening. Take a piece of paper and write down:

  • 🔋 Is there a reaction to turning the key (relay clicks, dashboard operation)?
  • 🔊 How does the starter behave: does it spin vigorously, with effort, or is it completely silent?
  • 💨 Is there a smell of gasoline from the exhaust pipe after trying to start?
  • ⚡ Are the lights on the dashboard (for example, CHECK ENGINE, immobilizer)?
  • 🌡️ At what temperature did the problem occur (cold, hot)?

These observations will narrow your search by 70%. For example, if the starter turns, but the engine does not catch, and the exhaust smells of gasoline, the problem is almost certainly in ignition system. If the starter doesn’t turn, but the tidy works, it’s either his fault or traction relay, or wiring.

Critical moment: on Grante With an 8-valve engine, the immobilizer often malfunctions. If the light on the dashboard with the image of the car and the key flashes or is constantly on, the system blocks the start. In this case, you need to separately check the chip in the key and the immobilizer antenna around the ignition switch.

📊 How does your Grant behave when you try to start it?
The starter turns, but the engine does not start
The starter does not turn, the tidy works
The starter does not turn, the tidy is dead
The car starts and immediately stalls
Another option

2. Electrical problems: battery, starter, wiring

If the car doesn't react at all when you turn the key (there are no relay clicks, the instrument does not light up) - the problem is in the power circuit. Start with the battery, even if it “worked yesterday”:

  • 🔋 Low battery: on Grante When the charge is low, the starter may make a series of clicks or be completely silent. Check the voltage at the terminals multimeter - must be no less 12.4 V no load. When trying to start, the voltage should not drop below 10 V.
  • 🔌 Oxidized terminals: White coating on the contacts increases resistance. Remove the terminals, clean them and the internal surfaces of the battery sandpaper, then lubricate lithol.
  • 🔧 Poor ground contact: on Grante the bulk comes from the battery to the body near the starter. It's easy to check - when you try to start, move the negative wire. If the car comes to life, clean the contact.

Does the starter turn sluggishly or jerkily? This could be either a discharged battery or worn starter brushes. On 8-valve Grante starter 57.3708 often fails after 100 thousand km - it can be restored (replacing brushes and bushings), but it is cheaper to buy a new one (~4500 rub.).

Important: if you hear a single click when you turn the key, but the starter does not turn, the traction relay is almost certainly burned out. It can be replaced separately (~1200 rubles) without buying the entire starter.

Inspect the battery terminals for oxidation

Check the battery voltage with a multimeter (should be ≥12.4 V)

Move the wires on the starter when trying to start

Ring fuses F1 (50A) and F31 (15A) in the mounting block

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Symptom Probable Cause Verification method
The tidy does not light up, there are no relay clicks Low battery or open circuit Ring the wire from the "+" battery to the starter, check fuse F1
The starter clicks but doesn't turn over The battery is discharged or the traction relay is faulty Apply 12V directly to the traction relay (pin 50)
Starter turns slowly Worn starter brushes or dead battery Measure the starter current consumption (should be ≤100A)
The starter turns, but the engine does not catch Problems with the fuel system or ignition Check using the algorithm from the following sections

3. Immobilizer and start lock

One of the most insidious problems Lada Grants — malfunctions of the immobilizer. The system may block the engine from starting for several reasons:

  • 🔑 The chip in the key is faulty: often breaks after falling or getting wet. It's easy to check - try starting the car with a spare key.
  • 📡 Problems with the immobilizer antenna: Located around the ignition switch. If the antenna is damaged, the system does not “see” the key.
  • 🖥️ Failure in the control unit (ECU): after flashing or a power surge, the immobilizer may “forget” the keys. Solved by retraining.

How to recognize immobilizer blocking? A light with a picture of a car and a key will flash or stay on on the dashboard. If the light is flashing 1 time per second - the key is not recognized. If flashing 2 times with a pause — the problem is in the antenna or unit.

What to do?

  1. Try starting the car with the spare key.
  2. If this does not help, remove the plastic around the ignition switch and check the immobilizer antenna connector (must be tightly connected).
  3. As a last resort, you can disable the immobilizer programmatically (required diagnostic cable and software OpenDiag or Lada Scan).
⚠️ Attention: on Grants with ECU M74 (until 2015) disabling the immobilizer can lead to problems with engine operation. On newer versions (M86) the blocking is removed without consequences.

4. Fuel system: why gasoline does not enter the cylinders

If the starter turns vigorously, but the engine does not start, check the fuel supply. On 8-valve Grante Most often the culprits are:

  • ⛽ Fuel pump: located in the tank. When you turn on the ignition, you should hear a characteristic buzzing sound (2-3 seconds). If it is not there, the pump does not work.
  • 🔌 Fuel pump relay: located in the mounting block under the hood (relay K12). Contacts often burn out.
  • 🧯 Clogged fuel filter: on Grant it is located under the tank. If the filter has not been changed for more than 30 thousand km, its throughput drops by 2-3 times.
  • 🔧 Injectors: Over time they become clogged with deposits. If the engine "troubles" before stalling, check them.

How to check the fuel pump?

  1. Remove the rear seat and open the gas filler flap.
  2. Disconnect the connector from the pump and apply it to 12V directly (plus to the gray wire, minus to the black). The service pump should hum.
  3. If the pump works, but gasoline does not flow, check the pressure in the rail (should be 3.8-4.0 bar).

On Grante With an 8-valve engine, a problem often occurs: after refueling at questionable gas stations, the pump begins to “howl” and then fails. This is due to clogging of the fuel pump mesh — it needs to be cleaned every 50 thousand km.

How to clean the fuel pump mesh without removing the tank?

If you don’t have time to remove the tank, you can try washing without disassembling:

1. Drain the gasoline from the tank (through a hose or pump it out with a pump).

2. Fill in 2-3 liters of pure gasoline + 100 ml of injector cleaner (for example, Liqui Moly).

3. Turn on the ignition for 10 seconds (the pump will drive the mixture through the system).

4. Repeat 2-3 times, then fill with normal gasoline.

⚠️ The method only works with light pollution!

5. Ignition system: spark plugs, coils, wires

If fuel is supplied, but the engine does not start, there is an ignition problem. On 8-valve Grante used:

  • 🔥 Spark plugs: resource - 30 thousand km. If the spark plugs are “wet” (filled with gasoline), they need to be dried or replaced.
  • 🌀 Ignition coil: one for all 4 cylinders. It often fails after 80 thousand km - the housing cracks or breaks through the insulation.
  • 🔌 High voltage wires: checked with a multimeter (resistance should be 5-10 kOhm).
  • 📊 Crankshaft position sensor (CPS): If it's faulty, the ECU doesn't know when to fire the spark.

How to check the spark?

  1. Unscrew the spark plug from the 1st cylinder.
  2. Place a high-voltage wire on it and attach it to ground (for example, to a valve cover).
  3. Have a helper turn the starter. A bright blue spark should jump between the electrodes of the spark plug.

If there is no spark, the problem is in the coil, wires or ECU. If the spark is weak (orange), the spark plugs or wires are to blame.

⚠️ Attention: on Grante with an 8-valve engine, if the timing belt breaks, the valve does not bend, but the crankshaft position sensor (DPKV) may fail due to vibration. If the car stalls while driving and does not start, first check the integrity of the timing belt!
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If the engine “troubles” when cold, but levels out after warming up, the spark plugs or wires are to blame. Replace them with a set (for example, NGK BPR6ES or Denso W20EPR-U11>).

6. Sensors and ECUs: hidden causes of malfunction

Modern engines are electronically controlled, and failure of any sensor can prevent starting. On Grante 8 valves are most often to blame:

  • 📶 Crankshaft position sensor (CPS): If it is faulty, the ECU does not know when to supply fuel and spark. Checked with a multimeter (coil resistance should be 550-750 Ohm).
  • 🌡️ Coolant temperature sensor (DTOZH): if he is lying, the ECU incorrectly calculates the mixture composition. When cold, the engine may not start due to an over-rich mixture.
  • 💨 Mass air flow sensor (MAF): If it fails, the engine starts and immediately stalls.
  • 🖥️ Electronic control unit (ECU): used on Grant M74 or M86. If there are power surges or corrosion on the board, the unit may fail.

How to check sensors?

  1. Connect a diagnostic scanner (for example, ELM327) and check for errors. Codes P0335 or P0336 indicate problems with DPKV.
  2. Test the sensor circuits with a multimeter. For example, on DPKV between the terminals A-B there must be 550-750 Ohm, and between A-mass and B-mass - infinity.
  3. Try disconnecting the suspicious sensor and starting the engine. If the car starts, the sensor is faulty.

On Grante With a mileage of more than 100 thousand km, a problem often occurs: the contacts on the ECU connector oxidize. This leads to “floating” faults - the car either starts or doesn’t. Solution: remove the block, clean the contacts WD-40 and crimp the connector.

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If the dashboard lights up CHECK ENGINE, but the scanner shows no errors - the problem is in the wiring or ground of the ECU. Check the power supply circuit of the unit (fuse F3 at 10A).

7. Mechanical faults: timing belt, compression, marks

If all electrical systems are in order, but the engine stubbornly does not start, check the mechanical part. On 8-valve Grante most likely:

  • 🔗 Broken timing belt: The engine will turn over more easily than usual (no compression). Checked visually - remove the belt cover.
  • 🔧 Broken timing marks: if the belt has jumped 1-2 teeth, the engine will not start or will run intermittently.
  • 💨 Low compression: if there is no pressure in the cylinders (less 10 bar), the mixture will not ignite. A common cause is worn piston rings.
  • 🛢️ Jammed camshaft: If you hear a metallic grinding sound when you try to start, immediately turn off the engine and disassemble the cylinder head.

How to check compression?

  1. Unscrew all spark plugs.
  2. Insert the compression gauge into the first cylinder.
  3. Have a helper turn the starter (5-7 seconds).
  4. Record the readings and repeat for the remaining cylinders.

Normal compression - 12-14 bar. The spread between cylinders should not exceed 1 bar.

⚠️ Attention: if when checking the compression in one of the cylinders the readings are lower 8 bar, and smoke comes out of the breather - get ready for a major overhaul. This is a sign burnt piston or valve.

8. Algorithm of actions: step-by-step diagnostics

To avoid wasting time, follow this order:

  1. Check the battery and starter (section 2). If the car does not respond to the key, there is no point in moving further.
  2. Make sure the immobilizer is not blocking the start (section 3). A flashing light is a reason to check the key and antenna.
  3. Check fuel supply (section 4). If the fuel pump does not hum, look for a problem in it or the relay.
  4. Diagnose the ignition system (section 5). There is no spark - the spark plugs, coil or wires are to blame.
  5. Read ECU errors (section 6). Codes P0300-P0304 indicate misfire.
  6. Check the mechanics (section 7). If the timing belt is intact, but there is no compression, get ready to repair the engine.

At each stage, record the results. For example: “the fuel pump is humming, but the pressure in the rail is 2.5 bar (the norm is 3.8)” or “there is a spark on cylinders 1 and 4, but not on cylinders 2 and 3.” This will help narrow down your search.

Typical diagnostic mistakes:

  • 🔧 They change spark plugs without checking the ignition coil.
  • ⛽ They clean the injectors without making sure that the fuel pump is working.
  • 🖥️ ECU errors are reset without eliminating their cause.
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If the car does not start after washing or rain, in 90% of cases the problem is electrical: the contacts have oxidized, the wires have gotten wet, or water has gotten into the sensor connectors. Dry the engine compartment with a hairdryer!

FAQ: Frequently asked questions about starting Grants 8 valves

The car does not start when cold, but starts normally when hot. What is the reason?

This is a typical symptom faulty coolant temperature sensor (DTOZH). The ECU receives incorrect data and over-riches the mixture to a cold one. Also check:

  • Compression in the cylinders (lower when cold).
  • Condition of the spark plugs (may be filled with gasoline).
  • Fuel injectors (can “flow” when cold).

If the DTOZH is working, but the problem remains, check thermostat. If it is stuck open, the engine will not warm up to operating temperature.

The starter turns, but the engine does not catch. What to do?

Verification algorithm:

  1. Check fuel supply: After turning on the ignition, the sound of the fuel pump should be heard. If not, check the fuse F3 (15A) and relay K12.
  2. Make sure there is a spark: Unscrew the spark plug, apply it to the ground and turn the starter. If there is no spark, the coil, wires or ECU are to blame.
  3. Check fuel rail pressure (must be 3.8-4.0 bar). If there is no pressure, the filter is clogged or the pressure regulator is faulty.
  4. Read ECU errors. Codes P0300-P0304 indicate misfires, P0335/P0336 - for problems with DPKV.

If everything is in order, but the engine does not start, check timing marks (could jump the belt) or compression (valves may burn out).

After replacing the timing belt, the car does not start. What's wrong?

Most likely Timing timing marks are off or the belt is not installed correctly. On an 8-valve Grant, the marks should match like this:

  • The mark on the crankshaft pulley is opposite the long mark on the cover.
  • The mark on the camshaft pulley is opposite the protrusion on the rear cover.

Also check:

  • Belt tension (the deflection between the pulleys should be 5-7 mm).
  • Condition of the roller (if it is loose, replace it).
  • The integrity of the belt (there should be no cracks or delaminations).

If the marks are correct, but the car does not start, check to see if the valves are bent (although on an 8-valve Granta they usually are not bent).

The car starts and immediately stalls. What's the matter?

Reasons:

  • Mass air flow sensor (MAF) lies - the ECU cannot correctly calculate the composition of the mixture.
  • The idle air controller (IAC) is faulty — the engine does not hold speed.
  • Air leak through a cracked intake manifold pipe or gasket.
  • Clogged fuel filter — the engine starts on the remaining gasoline in the ramp, but then stalls.

How to check:

  1. Disconnect the mass air flow sensor and try to start. If the machine is running, the sensor is faulty.
  2. Check the tightness of the intake tract (you can splash WD-40 at the joints - if the speed changes, there is suction).
  3. Measure the voltage at the IAC (should be 12V with the ignition on).
How to start a Grant if the battery is dead and the starter does not turn?

Methods:

  • "Lighting up" from another machine:
    1. Connect the positive terminals red wire.
    2. Connect the minus of the donor with mass (not a terminal!) Grants.
    3. Start a donor, let it work for 5 minutes, then try to start Granta.
  • Push launch (only for manual transmission!):
    1. Turn on the ignition and 2nd gear.
    2. Accelerate the car to 10-15 km/h and quickly release the clutch.
    3. After starting, do not turn off the engine for 10-15 minutes to allow the battery to recharge.
  • Using a starter charger (ROM):
    1. Connect the ROM to the battery (observe the polarity!).
    2. Set current 40-50A and try to start.
    • ⚠️ Attention: do not try to start the Granta from a pusher if there is less in the tank 5 liters of gasoline - this can damage the fuel pump.