Not very pleasant sensations arise when the car engine does not start. Especially when you are in a hurry somewhere and the engine refuses to work. And the reasons why this happens can be different, ranging from trivial to more serious. In order to avoid getting into an awkward situation, it is very important to know what faults may be causing the engine on a VAZ 2109 to not start. After all, it often happens that the engine does not start for a reason that lies on the surface itself. And finding it is much more difficult than a serious breakdown.
The simplest malfunctions and methods for eliminating them
First of all, of course, it’s worth talking about security system. The fact is that when arming, the engine is blocked. And until the alarm is turned off, the engine cannot be started. It is possible that the starter will spin, but the spark will not be supplied to the spark plugs. Pay attention immediately to led indicator, which shows the operation of the alarm.
There are often cases when motorists install secret buttons. When buying a car, be sure to ask the owner if the car has one. Because when cleaning the interior or doing repairs, you can accidentally catch it. Such anti-theft system very simple. One terminal of the switch is connected to ground, and the second to the signal wire of the Hall sensor. The symptoms are the same as when the alarm is on. The engine spins but there is no spark. The way out of the situation is to disconnect the wire going to the tachometer in the block above vacuum booster brakes
Another commonplace malfunction is the breakdown of the Hall sensor itself. The symptoms are the same as in the two previous cases. True, sometimes, with a partial failure, a spark may sometimes jump and the engine will make several “sneezes”. Only replacing the sensor will help. To do this, you need to disassemble the ignition distributor. Often the wire just breaks. Therefore, in the event of a breakdown on the road, the best solution would be to insulate the wire and drive to the repair site.
Serious damage
And here it’s worth starting with a broken timing belt. The motor spins, but very easily, since the valves are all open. Check the belt right away to see if it is in place. Moreover, sometimes it happens that the front part is intact, but the back part, which runs along the roller and pump, is torn. Remove protection and check integrity. Of course, you can’t do without replacing the belt, so there should always be one in stock, at least a little “alive”.
If the engine does not start, but the starter spins quickly without engaging the flywheel crown, then we can conclude that the teeth have worn out. Try turning on third gear and pushing the car forward 30 centimeters. The crankshaft will turn a little and there will be a whole section of the crown opposite the starter. If the wear is too great, you will have to start it only from a tug.
Breakdown of the starter and oxidation of the negative wires can also cause the engine to not start. In the case of the starter, there are two most common breakdowns - the bendix, or more precisely, the overrunning clutch, and the brushes. It is very easy to check the overrunning clutch; you just need to turn the gear in both directions. In one it should rotate freely, but in the other it should not rotate.
How often does it happen that your beloved car (VAZ 2109, 099, 08) flatly refuses to start or stalls on the road? You shouldn’t immediately call gifted craftsmen or drag the poor guy to the service center on a rope. There is only one good news for now. I'll tell you what needs to be done, but only if your hands grow from the right place :).
There can be several reasons for an engine stalling and not starting. Initially, we turn the key in the ignition and listen to whether the starter turns, if not, this is the reason, but this is a no brainer. If the starter turns, we move on. No matter how stupid it may sound, you need to check if there is gasoline in the tank.
Turn the key and look at indicator lamp remaining fuel in the tank. If you are sure that there is gasoline, go further and check for a spark. Let's unscrew any spark plug, stick it into a high-voltage wire and touch the engine (to ground)...
Here we need an assistant. We put him behind the wheel and let him turn the starter with the key. Is there a spark at the spark plug tip? Hood. No? Badly. The switching unit or its wiring is faulty. It's hard to do anything about it. Try changing the switch. You should also check the spark on the central wire coming from the coil. We check using the same method with candles. No spark may indicate a coil failure.
Let's check the power system. If it is winter outside, water could get into the gasoline supply system and freeze. We check: unscrew the air vent and press the fuel pump button several times. Is it gurgling? Gasoline flows well into the carburetor. No?
Either the above water has somehow gotten into the system, or, more likely, the fuel pump is faulty. Pay attention to the filter fine cleaning. It should be inspected for cracks and damage. You can also look at the hoses through which gasoline flows. Have you checked everything? Is the power system ok?
Next step, candles! We unscrew the candles. All. Let's see if there is carbon on them. U thrifty driver There should always be a spare set of working, tested spark plugs. “Spitted” (black candles with carbon deposits and filled with gasoline) are useless to clean with sandpaper and wipe. They need to be heated over a gas stove.
So you inserted the working spark plugs, but it didn’t help? Let's move on to the ignition system. We remove the high-voltage wires from the distributor. By the way, because of the wires, the car may also not start, check them. We look at the distributor cover.
If the inside is chipped or the contacts are scorched, replace the cover. Next we remove the slider. It can also be replaced. Unscrew 2 bolts. We disconnect the wiring from the hall sensor and change the sensor itself. We reassemble everything in reverse order with new parts.
Location high voltage wires on the distributor cap is out of order. The first wire (marked 1 on the cover) comes from cylinder 1 (far left), then cylinder 2, cylinder 4 and cylinder 3 will go clockwise. If you mix up the wires, the car will stall terribly or won’t start at all.
All that remains is to check the timing belt. It is located on the left side, under the casing. Remove and look at the belt teeth. If there is not enough and the belt has slipped, then it needs to be changed. The only question is the consequences. If you have a 1.3 engine, then the valves may be bent (don’t even try it yourself). If it's 1.5 then it's probably okay.
Well, that’s basically the whole system. Everything should start. If not, you can, with a pure soul (I did what I could), take it to third-party masters. If the car does not idle, check solenoid valve. It is screwed into the carburetor with right side. Remove the terminal.
Turn the key to turn on the ignition and touch the terminal to the valve several times. Are there any clicks or spark? ok, it works. Just unscrew it and blow out the nozzle located at the end. The valve must be screwed back by hand, preferably without overtightening it.
Also, unstable idling or jerky movement can be a consequence of an unadjusted carburetor, as well as spit-stained spark plugs (from an over-rich mixture).
Good luck on the roads.
What to do if your favorite VAZ 2108, VAZ 2109, VAZ 21099 refuses to start? This article will discuss a troubleshooting diagram. As you probably know, for the engine to start and run, three conditions are necessary: air, gasoline, spark. When rotating crankshaft engine VAZ 2108, VAZ 2109, VAZ 21099, the combustible mixture is sucked into the cylinders (a mixture of air and gasoline in a certain proportion). After closing the intake and exhaust valves at the end of the compression stroke, a spark should appear on the spark plug, igniting the combustible mixture - the engine starts.
Let's consider the diagnostics of identifying a fault along the chain. The entire methodology is reflected in detail in the figure; the text provides the necessary comments on the points.
1) If the starter does not crank crankshaft VAZ 2108, VAZ 2109, VAZ 21099, then we check the following: the battery must be charged, when you turn the ignition key you should hear a click of the solenoid relay operating, all connectors must be connected to the starter.
2) If the starter rotates the crankshaft. It is necessary to determine what is not entering the cylinder, a flammable mixture or a spark. First we look for a spark. To do this, remove the high-voltage wire from any spark plug, bring it at a distance of a centimeter to ground and turn the starter.
3) If there is no spark to the spark plug of a VAZ 2108, VAZ 2109, VAZ 21099, check whether the spark is going to the ignition distributor (distributor). To do this, remove the central wire from the distributor, bring it to a distance of 1 cm to the ground and turn the starter. If the spark jumps from wire to ground - the problem is in the ignition distributor: check the slider, clean the contacts.
4) If there is no spark to the ignition distributor, diagnostics of the ignition system is necessary.
There are two options for further troubleshooting:
A) Using a diagnostic device contactless system ignition
B) Manual fault detection.
A) You have a device, their varieties may be different, but the principle of operation is the same: power supply and operation of the Hall sensor and switch are displayed by lights.
The device is connected to the open circuit of the switch. Remove the connector from the switch and connect it to the device connector. Place the second connector of the device on the switch. Turn on the ignition: the ignition system power light and the Hall sensor power light should be on.
When the starter of the VAZ 2108, VAZ 2109, VAZ 21099 rotates, the following should blink: the switch control light, the pulse light from the Hall sensor.
If the switch control light does not blink, replace the switch.
If there are no pulses from the Hall sensor, disassemble the ignition distributor and make sure that the distributor runner rotates when the starter rotates. If the starter turns, but the distributor runner does not, the timing belt is broken. If the slider rotates but there is no signal from the Hall sensor, replace the Hall sensor.
B) Troubleshooting option without an ignition diagnostic tool for VAZ 2108, VAZ 2109, VAZ 21099. Disassemble the ignition distributor and make sure that the distributor runner rotates when the starter rotates. If it doesn't turn, the timing belt is broken. If the slider rotates, check that the distributor drum does not touch the Hall sensor. Make sure the wires and connector of the Hall sensor are in good condition. If everything is normal, change the switch, the most common reason when there is no spark, the switch burns out. If, even after replacing the switch, a spark does not appear, suspicion falls on the ignition coil and connecting wires. The ignition coil (in popular parlance) fails extremely rarely, but such cases also happen.
Ignition coil
5) If there is a spark, but the engine does not start, remove the air filter cover.
Is the filter clean and free of oil? We try to start a VAZ 2108, VAZ 2109, VAZ 21099 without an air filter cover, if it starts, it means there is no air access to the carburetor, the filter is clogged, the air supply is filled with oil.
6) If it doesn’t start, completely remove the filter with the cap and unscrew the fuel hose from the fuel pump to the carburetor on the carburetor side. We turn the starter - gasoline should spray out. Doesn't it splash? Or fuel pump is out of order, or fuel is not supplied from the tank, if it is there of course.
7) If gasoline splashes when turning the starter, unscrew the fuel return hose from the carburetor. Plug the return with your finger and blow into the supply with your mouth. Is air flowing into the float chamber? If yes, then gasoline is also passing through, you need to blow out the entire carburetor compressed air.
8) Is there no air flowing into the float chamber? Check the carburetor mesh filter. We unscrew it and clean it. Did not help? — The needle valve may be stuck. Tap the side of the carburetor with a wrench or blow compressed air into the feed hole.
9) If you still cannot blow air into the float chamber, remove the carburetor cover. Take it in your hands and try to blow again. Air does not pass through - change the needle valve.
10) If air passes through when the cover is removed, but not when it is clamped on the carburetor, the fuel jets are clogged. The carburetor must be completely purged.
11) If after the work done the car still does not start, unscrew the spark plugs.
Look, are they filled with gasoline or not? If they are, you need to dry them. Turn on the gas stove and, holding the pliers, dry the candle over the fire. If the spark plugs are still dry, you can try spraying a few drops of gasoline into chamber 1 of the carburetor (closer to the passenger compartment). The resulting vacuum may pierce the carburetor and the engine will start.
The techniques described above will help you start a VAZ 2108, VAZ 2109, VAZ 21099 in more than 90% of cases. However, in case of problems that are difficult to diagnose (the timing belt has slipped more than a few teeth, poor or absent compression in the engine, the carburetor is not adjusted), only a service station can help you.
The VAZ-2109 car was initially equipped with carburetor engines, and then injection ones. No matter what engine is on the nine, it will not start at faulty system launch, because starter either cannot turn the crankshaft, or rotates it with insufficient frequency. The reasons for this state of affairs may be insufficiently charged accumulator battery , oxidized terminals, both at the battery terminals and at traction relay, in which internal contacts can also burn out. Failure of the starter overrunning clutch will also result in the engine not starting, since the crankshaft will not rotate, although the starter armature shaft will rotate.
Another malfunction that will prevent the engines of carburetor and injection nines from starting will be failure timing belt timing gear drive. It may simply break or, more likely, cut off the teeth; also, if the belt tension weakens, it may jump a couple of teeth on the drive gear, which will lead to a violation of the valve timing and the engine will not start in this case.
If everything is in order with the timing belt and starter, then carburetor engines We check the VAZ-2109 further power system And ignition system. Checking these systems usually begins with the presence of a spark on the spark plugs. If it is not on the candles, then check if it is on high voltage wire, coming from the ignition coil. If there is a spark in this place, you will have to check whether the distributor slider is broken to ground, whether the contacts of the distributor cover are burnt, and whether the carbon rod transmitting voltage to the slider is stuck. If there is no spark on the center wire, then the culprits will be either the ignition coil itself or the switch.
If there is a spark on the spark plugs, you will have to check the operation fuel pump and carburetor. We check the operation of the fuel pump by disconnecting the gas line from the carburetor and supplying fuel to manual mode. If there is no pressure or it is weak, it means that the fuel pump diaphragm is torn. If the pressure is strong, you will have to remove it air filter and the carburetor cover, and then blow out the jets with compressed air, and also do not forget to check the operation of the needle valve, there are times when it gets stuck and then the fuel supply to the carburetor float chambers stops.
On injection engines VAZ-2109 controls both ignition and fuel supply to the engine cylinders the electronic unit, which receives information from seven sensors, and then processes it and issues the appropriate commands to the injectors and ignition coils. If the crankshaft position sensor fails, the engine will not start, but in order to determine this, it is necessary to carry out diagnostics and use the error codes to identify the malfunction. The engine will not start even if it fails electric fuel pump, either due to lack of voltage at its terminals, or due to short circuit its windings.
