Fuel level sensor VAZ-2109: injector, carburetor

A fuel level sensor is a vehicle mechanism that allows the driver to monitor fuel readings using data on the dashboard. Using this device, the driver can make calculations based on mileage and monitor consumption. Also, when operating a car, the car owner, using the readings, can calculate his route, taking into account the location of gas stations and the amount of gasoline in the tank, so as not to dry out on the road. Incorrect data can lead to unpleasant consequences, so it is recommended to diagnose and replace the device in a timely manner.

Principle of operation

The VAZ-2109 fuel level sensor is installed in the fuel tank and is called tubular because the contact is transmitted through pipes. Moreover, the installation of the FLS is always carried out in one place, no matter whether it is a carburetor or an injector. According to the principle of operation, the float creates contact and transmits information to the electronic control unit. After processing the received information about the amount of gasoline, the electronic control unit displays it on the dashboard.

What does the tachometer jump at high speeds indicate?

If the tachometer needle jumps during a trip or at high speeds, then the problem is also associated, as a rule, with the car’s engine. But before contacting a car mechanic, you can independently check the presence of fuel in the tank, inspect the camshaft drive chain, the timing belt that connects the crankshaft and the camshaft; perhaps it is loose and needs to be tightened. These are the main and frivolous reasons that can cause interruptions in engines and jumps in its speed.

If no visible problems are found with these elements, then you should go to an auto mechanic. Delay and failure to respond to a signal such as unstable tachograph operation can lead to serious damage to the vehicle’s cylinder-piston system and costly repairs.

It is better not to engage in diagnostics and independent repairs if the tachometer needle is floating. You should trust specialists who, using special equipment, will identify and eliminate the causes of the failure.

Greetings nivavoda! A problem arose - I start my Niva in the morning and start driving - at first everything is fine. Then once the revs drop right at speed and the car stalls. So five times. I start it up as if nothing had happened and it drives on, it also starts as usual with half a turn. Then I’m driving along the highway and I see the tachometer needle jumping from 0 to 6 thousand; in short, it’s showing nonsense. The engine is idling, the arrow jumps for 2 seconds and the car stalls. I looked at all the chips on the ignition, cleaned the contacts on the wires, cleaned the ground everywhere, it didn’t help. Ignition electronic carb. Tell me what this nonsense is!

Read more: Gle Mercedes Benz 2021 specifications

Alekhandro_Goncharuk
26 September 2012, 09:04

Alekhandro_Goncharuk
September 26, 2012, 09:09
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Jei_Shushunin
September 27, 2012, 09:32
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Makssh_Lukinih
September 27, 2012, 10:12
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Georgis_Grishnyakov
September 27, 2012, 11:35
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Sasha_Zyuzin
September 28, 2012, 11:37
v

Yes, if it were a contact one - if the arrow twitches - the conder is 100%

She doesn't suit you?? collapse branch

Alekhandro_Goncharuk
28 September 2012, 13:08
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Sergey_Komarov
28 September 2012, 13:09
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Sasha_Zyuzin
29 September 2012, 13:18
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Sergey_Komarov
September 29, 2012, 14:00
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Sasha_Zyuzin
29 September 2012, 14:10
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Alekhandro_Goncharuk
29 September 2012, 17:20
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Artur_Bibikov
30 September 2012, 14:04
v

where can I even buy a switch??) for 21312, carb) only the tachometer is glitchy and most often when I’m driving in neutral or switching to a higher gear.. I think that’s the problem, and the car doesn’t even always start the first time, and even if it doesn’t start the first time then not with half a turn.. with half a turn the warmed one starts up smoothly.. I changed the spark plugs, changed the ignition wires, the weight is normal..

The problem is that I don’t know where to find a new switch or an internal analogue. collapse branch

120 posts on previous pages

Reg.: 02/16/2008 Messages: 58 From: Belgorod Age: 32 Car: VAZ-21213.94.

I have the same problem: from the beginning the tachometer shows no signs of life, but after about forty minutes of driving it suddenly comes to life and works without interruption. The Hungarian gearbox is old, the ignition system is contactless, I bought the car recently.

Added after 4 minutes 51 seconds:

I checked the wire from the coil and even duplicated it, no damage is visible on the board, I rang all the described wires - no results

Reg.: 12/06/2004 Threads / Messages: 4031 / 23190 From: Moscow Age: 65 Car: 21214M, 2013

Alexey aka ALER.

Reg.: 12/04/2007 Messages: 76 From: St. Petersburg Age: 38 Car: VAZ 2121 89.

Reg.: 02/16/2008 Messages: 58 From: Belgorod Age: 32 Car: VAZ-21213.94.

Reg.: 05.25.2006 Threads / Messages: 11 / 1261 From: Moscow Age: 13 Car: 214, vw

Serge N

, thanks for the diagram!

and now the question is: why might the tachometer in the Hungarian panel not work? The resistors are soldered, there are no visible problems.. is there any way to check? or “no prospects, better buy a new gearbox”

Reg.: 12/06/2004 Threads / Messages: 4031 / 23190 From: Moscow Age: 65 Car: 21214M, 2013

Alexey aka ALER.

Reg.: 05.25.2006 Threads / Messages: 11 / 1261 From: Moscow Age: 13 Car: 214, vw

The printed circuit board of the tachometer itself is intact, without stains, without traces of corrosion, cracks, etc.

When the mechanism is removed, there are 2 sectors on the board with an angle of 90 degrees, and on the counter part of the device there are bent legs. these 2 sectors were scratched in one place, to the point of chipping the metal. I carefully filled it with solder and then sanded it. but this was the 2nd showdown today i.e. This is not the reason.

with a burnt-out 51 ohm resistor, what could go wrong? I'm a little far from electricity, so forgive my opuses

I'll try to measure the voltage tomorrow morning and report back

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Signs of trouble

FLS failure does not happen often, but at some point it can take the driver by surprise. Incorrect gasoline readings can result in the car owner overfilling the car tank at a gas station or running dry on the road.

Although a breakdown is a rare occurrence for this device, it becomes immediately noticeable to the car owner. The appearance of problems with FLS manifests itself in a car as follows:

The arrow, which shows the amount of gasoline in the gas tank, constantly remains at zero, even when refueling the car;
The arrow indicates overestimated indicators. For example, a full tank is shown when it is only half full;
The arrow indicates underestimated indicators. For example, when filling a full tank, the dashboard displays much less.

It is not necessary to get a new device if these problems arise. In some cases, it is possible to adjust it and resolve inaccuracies.

Place 21093 in the AvtoVAZ model line

The prototype for the VAZ 21093 was the front-wheel drive hatchback VAZ 2109 “Sputnik”, with a 1.3 liter carburetor engine, produced in Togliatti since 1987. Its engine power was 64 horsepower. Externally, the 21093 Samara, which appeared in 1990, was not much different from the 2109. Dimensions, design, design - everything was almost like the nine. The main differences were hidden under the hood.

Modification 21093 received a new engine. The designers of the Volzhsky Automobile Plant increased the cylinder diameter from 78 to 82 mm with the previous piston stroke of 71 mm. This resulted in an increase in the working volume from 1288 cubic cm to 1499. The car's power increased, its performance characteristics improved (speed and acceleration dynamics), and fuel consumption decreased slightly. In general, the VAZ 21093 car has acquired noticeable liveliness.

How to replace a carburetor fuel level sensor

Since the location of the carburetor FLS does not differ from the injection one, the replacement process will be identical. Before starting work, you need to open the rear seat cover and find the self-insulating covering. It has a specially cut recess that allows access to the gas tank. We bend the recess and get to the hatch.

It is secured with 2 Phillips screws. We use a screwdriver to unscrew them. After this, unhook the chip with the wires. Next you need to loosen the hoses. Clamps are connected to each of them. Use a screwdriver to loosen them.

Next we use wrenches; we need 10 wrenches. We unscrew the tubes near the hoses using a wrench and disconnect them.

In order to remove the VAZ-2109 fuel sensor, you need to unscrew the mount, which is held in place with 7 nuts. We will need a key for 7, we will use it to dismantle it. Keep in mind that one of the wires is connected to the mount and is connected to ground. After this, we take out the FLS with extreme caution so as not to damage the float.

The gasket must be inspected as it may be damaged. If there is damage, it is recommended to replace it. To do this, you can buy a new gasket or make it yourself. After replacing the gasket, we reassemble.

If the FLS is replaced, then it is necessary to install a new device and reassemble it in the reverse order. Carefully place the FLS to protect the float from damage. We connect the mount and tighten the 7 nuts using a 7 wrench. Next, we attach the wire that engages the ground.

After this, we put the hose on the tubes and tighten it with a 10 wrench. Next, we tighten the clamps using a screwdriver. We take a chip with wires and connect it to the grooves. We tighten the hatch with Phillips screws using a screwdriver and close the access by bending the self-insulating covering and installing the seat back.

If the FLS does not work after replacement, then you need to check whether everything was connected correctly. In confirmation, look at the connection of the chip and insert it more tightly.

Messages 11

1 Topic by Andrey08 2009-12-16 13:01:12

Registered: 2010-08-11
Posts: 91
Reputation:

Topic: Not Working: All Tidy, Wipers, Fern Guard on VAZ 21099

My friend has a VAZ 21099 injector.

And recently the following happened: all the instrumentation stopped working (speedometer, tachometer, etc.), the wipers and ferns do not work. the headlights seem to come on

Today I talked to him, they say in the morning everything worked fine, but in the afternoon it immediately turned off right on the go.

I advised him to pay attention to the fuse box (they say the frost has hit, condensation is forming or it’s just wet). I would like to hear your opinion, what do you think about this? mb has this happened to anyone?

I would like to hear your opinion, what do you think about this? mb has this happened to anyone?

2 Reply from maik 2009-12-16 19:38:20

maik
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Registered: 2008-11-25
Posts: 187
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Re: Not working: All tidy, wipers, fern on VAZ 21099

My friend has a VAZ 21099 injector.

And recently the following happened: all the instrumentation stopped working (speedometer, tachometer, etc.), the wipers and ferns do not work. the headlights seem to come on

Today I talked to him, they say in the morning everything worked fine, but in the afternoon it immediately turned off right on the go.

I would like to hear your opinion, what do you think about this? mb has this happened to anyone?

You can also check the ground on the tidy. (mass is strength))) all troubles come from it.

3 Reply from ils 2009-12-17 06:58:25

ils
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Re: Not working: All tidy, wipers, fern on VAZ 21099

I agree with maik - most likely the mass has moved away. It is attached under the dashboard above the place where the steering shaft is screwed to the body. The second place is the ignition switch relay. I’ve seen two types of such relays - some have a tongue that needs to be screwed to the body (there is one in the engine compartment - it looks like a starter relay), the second has a black wire - it should go somewhere to the body. I checked it on the pile - as soon as the mass disappeared from this relay, the entire tidy died, the wipers also did not work.

4 Reply from SokolOFF 2009-12-17 08:38:33 (2009-12-17 08:42:23 edited by SokolOFF)

SokolOFF
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Re: Not working: All tidy, wipers, fern on VAZ 21099

Judging by the quantity of everything at once, I dare to guess:

- ignition switch contact group

- one of the pads (it seems red) flew out of the block on the passenger compartment side

-a flooded block is also an option

PS I would check in just this order)) Well, first, of course, a visual inspection of the block. As for the mass, IMHO, it’s unlikely. After all, the headlight switch in the same place takes a lot of weight.

By the way, I just remembered another question: are “headlights” HEADLIGHTS (low beam, high beam) or dimensions? And does the car even start? Simply, if the lights are on, but the car does not start, then 90% of the ignition relay is either a contact group (or their wiring). I had such a case.

Registered: 2010-08-11
Posts: 91
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Repair of fuel level sensor VAZ-2109

If the gasoline readings are incorrectly displayed on the dashboard, then this is not yet a reason to purchase a new part. Sometimes it is enough just to adjust the operation of the old device. Initially, in order to check the functionality, we use a multimeter.

We bend the seat, get to the fuel hatch and unscrew it with a screwdriver. Disconnect the FLS from the connected wires and loosen the clamps on the hoses. We unscrew the tubes using a 10mm wrench and unscrew the 7 fasteners that secure the FLS. We take out the device, trying not to damage it.

We connect the device and look at the resistance. If you do not act on the float, the multimeter should show a resistance of 290–320 Ohms. Let's try to raise it up and look at the values. At this point they should show between 8 and 20 ohms.

We check the readings against the standards. If the readings have deviations, then we throw out the mechanism. It may be that the resistance remains at zero and the multimeter does not show it. In this case, the device is not suitable for use and must only be disposed of.

If the resistance is within normal limits, then the mechanism is working properly and the first thing we will look at is the wire that goes to the ground of the car. It is necessary to check its integrity and also inspect for the presence of rust. If the wire oxidizes, it also does not allow good contact. In this case, it must be cleaned. If stripping the ground wire was successful, but the situation has not changed, then we continue to look for the cause further.

Let's look at the wires that go to the FLS. One of them is red, the other is blue. Red is responsible for the indicator on the driver's dashboard, blue is responsible for the light on the dashboard.

Now let's take a regular wire and use it to connect the red wire to the ground of the car. We look at the readings on the dashboard, if when we close we see that the arrow has risen all the way, then everything should be so. If there is no reaction from the short circuit, then the problem may be in the arrow itself. Also, problems with the wiring cannot be ruled out, so it is recommended to ring each wire at the input and output.

After this, we carry out the same manipulations with the blue wire. If the light comes on at this time, the test is successful.

Purpose

Gasoline filter for VAZ 2109
Functional purpose of the fuel filter.

This:

cleaning from dirt and dust particles;
condensate filtration;
preventing resins from getting into the car engine;
anti-corrosion protection;
prevention and prevention of blockage of the fuel line, etc.

Reasons why you need to change your gasoline filter regularly:

prevention of related malfunctions, since any breakdown in a car, as a rule, has a cascading nature;
fuel overload of the current filter;
the recommended service life has expired;
the appearance of signs of malfunctions that indicate the use of low-quality fuel.

Motorists who drive a VAZ 2109 should know that the gasoline filter must be changed no later than after 20 thousand kilometers. It is also recommended to replace the internal cabin filter at the same frequency. As you know, the cabin filter performs the following functions:

prevents fuel combustion products from entering the cabin;
cleanses the circulating air, saturating it with necessary substances;
directly affects the physical condition of the driver;
is an effective remedy against drowsiness, as it supplies clean air, which is necessary for the human body.

Purchasing new equipment

Repairing old equipment is not difficult if it has become unusable due to oxidation or rust formation. Wiping the device can help restore contacts, but if the device is broken, even after restoration it may display incorrect data. If the error is more than 10%, then this can significantly affect the driver’s comfort behind the wheel, as well as the risk of being left with an empty tank on the road.

Therefore, if there is an error, it is recommended to replace it with a new device. Thus, the car owner can be confident in the accuracy of the data displayed on the dashboard. The cost of spare parts is relatively inexpensive; an injector can be found within 300 rubles. The part is easy to maintain and does not require replacement often, so it is recommended that if the data is inaccurate, replace it immediately.

Purchasing new equipment ensures that correct readings are displayed. By purchasing original spare parts, the car owner can forget about replacing them within 2-3 years.