Do-it-yourself Daewoo Nexia gasoline pump repair

In detail: do-it-yourself repair of a Daewoo Nexia gas pump from a real master for the site my.housecope.com.

More detailed information on the electric circuit diagram of the fuel pump is contained in the Head Onboard electrical equipment.

1. If the fuel pump does not function when the ignition is turned on (no characteristic sounds are heard from the gas tank), check the condition of the fuel pump fuse (no. 1), or the ACG S fuse (both 15 A) in the assembly block located in the engine compartment. If necessary, replace the knocked-out fuse and retest. If the pump starts to run after replacing the fuse, check the pump wiring for signs of a short between the PGM-FI relay and the pump.

The models considered in this Manual are equipped with a special engine start enable circuit that supplies power to terminal No. 2 of the main relay only when the clutch (RKPP) is depressed / the AT selector lever is set to “P”. The protection of this circuit against overloads is provided by a special fuse for 7.5 A, - check the condition of fuse No. 13 in the mounting block in the car's engine compartment.

2. If replacing the fuses does not restore pump operation, check the condition of the main relay electrical circuit.

The main relay is attached to a bracket under the vehicle's dashboard to the left of the steering column. Ask the assistant several times to turn the ignition on and off and check the correct supply of battery voltage to the relay connector (see the accompanying illustration).

3. With the ignition off, voltage should be present at terminal 7 of the connector. At terminal 5, voltage should be present only when the ignition is on (do not start the engine), while terminal 2 should be energized only when the clutch pedal is depressed (models with manual transmission) / the selector lever is set to “P”. 4. If there is no voltage, check the condition of the circuit in the area between the relay and the PCM, otherwise, make sure that the relay itself is in good condition.

Video (click to play).

5. Use a jumper wire to connect the positive terminal of the battery to terminal 2, and ground terminal 1. Use an ohmmeter to check for conductivity between terminals 4 and 5. If there is no conductivity, replace the relay.

6. Now apply battery power to terminal 5 of the relay, terminal 3 to ground. There should now be conduction between terminals 6 and 7, otherwise replace the relay. 7. If conductivity is present, apply power to terminal 6, ground terminal 1 and check the conductivity between terminals 4 and 5. If there is no conduction, replace the relay, otherwise check the condition of the circuit between the fuse, relay and pump.

8. If in the course of the check described above it is not possible to identify the cause of the pump failure, make sure that the power supply to the fuel pump assembly in the gas tank is in good working order. If the voltage is supplied correctly, replace the assembly of the pump / fuel flow sensor (see Section Removal and installation of the fuel pump).

Service and operation

Manuals → Daewoo → Nexia (Daewoo Nexia)

The principle of operation and checking the serviceability of the functioning of the fuel pump

Remember that gasoline is an extremely flammable liquid! Observe all fire safety precautions when handling power system components.Do not smoke! Do not approach the work site with an open flame or a carrier unprotected by a lampshade! Do not service the system in rooms equipped with natural gas fired heaters (such as hot water heaters and clothes dryers) equipped with a pilot torch. Do not forget that gasoline is one of the carcinogenic substances, i.e., substances that contribute to the development of cancer! Try not to allow fuel to get on open areas of the body, use rubber protective gloves, in case of accidental contact with fuel, wash your hands thoroughly with warm water and soap. Collect spilled fuel immediately and do not place a rag soaked in fuels and lubricants near open flames. Remember that the fuel injection system is under pressure at all times. Relieve any residual pressure in the system before disconnecting the fuel lines.

Wear safety glasses when servicing power system components. Keep a class B fire extinguisher on hand at all times!

When the ignition is turned on, a signal from the ECM activates the fuel pump relay, the impeller of which begins to rotate.

The fuel pump relay remains active only if the ECM detects that the engine is starting or that the starter is cranking. Otherwise, the ECM will open the assembly ground circuit after a few seconds and the pump will shut off.

1. Dump the pressure in the power supply system (see Section Dumping the pressure in the power supply system). 2. Remove the fuel tank filler cap.

3. Disconnect the negative cable from the battery.

If the car stereo is equipped with a security code, before disconnecting the battery, make sure you have the correct combination for putting the audio system into operation!

Today, the quality of domestic fuel leaves much to be desired, and this factor directly affects the operation of vehicles. In particular, cars that run on low-quality gasoline are more susceptible to breakdowns in the operation of the gas pump or fuel filter. Today you will learn how to replace the filter of the Nexia fuel pump, what is needed for this and how to properly change the element.

Daewoo Nexia cars, like any other cars, require filling only high-quality gasoline. Unfortunately, it is difficult to find one at domestic gas stations, as a result of which the car owner has to perform technical work to replace certain parts more often. Here we are talking about the filter of the Nexia fuel pump. You can perform such repairs yourself, and today you will learn how to do it.

Image - Do-it-yourself Daewoo Nexia fuel pump repair

Old and new mesh of the filter element for the fuel pump of the Daewoo Nexia car

Please note: the car manual does not say anything about replacing the filter element. That is, the manufacturer has installed a filter for the entire life of the car. But considering the low quality of Russian gasoline, experts recommend replacing the filter mesh or at least cleaning it at least every 20 thousand kilometers.

First of all, you should thoroughly prepare. Keep in mind that when you disassemble the gas pump, it will be problematic to go to the store for something missing, so it's better to prepare everything in advance. So, you will need:

  • wrench for 8;
  • gas pump gasket;
  • new mesh for the filter element.
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Before starting work on replacing the fuel pump filter, it is necessary to relieve the pressure in the system. To do this, start the engine, and then find the relay on the fuse box responsible for the operation of the fuel pump. Remove it from the socket: after a while the car should stall. When this happened, disconnect the negative terminal of the storage battery.

This completes the replacement of the filter mesh. As you can see, there is nothing difficult in this - you just need to follow the steps indicated in the instructions.

In this video, the author reviews the Daewoo Nexia car and indicates in it all the shortcomings of this model.

Uneven engine operation, jerking when driving at low speeds or dips at high speeds, difficult starting or refusal to start the engine. These symptoms may indicate a dozen malfunctions, one of which is a failure or partial loss of performance of the fuel pump on the Daewoo Nexia. Out of order, which means we will change it with our own hands, especially since the whole procedure will take at most 30-40 minutes.

Before going directly to work, you need to think about safety measures, since we will be opening the fuel tank.

It is advisable to carry out the work either outdoors or in a well-ventilated box. Naturally, there should not be any sources of open fire nearby. To replace, we only need a head or a socket wrench for 8, a gas pump flange gasket (catalog number 90232009), a grid (coarse filter) of a gas pump, too, most likely, is clogged (catalog number 96183953 ) and the fuel pump itself with a catalog number 0986580506 .

Why do people change a Nexia gasoline pump to a VAZ-2110 gasoline pump? There may be two reasons:

  1. On Korean Nexias, the filter mesh for the gas pump comes complete with the pump itself (the gas pumps of the Korean and Uzbek Nexia are different!), And replacing the mesh is not cheap - you have to change it together with the gas pump (about 2.0-2.5 thousand rubles)
  2. If a native gasoline pump burns out, then you have to change to the same one (about 2.0-2.5 thousand rubles)

Externally, the petrol pumps from Nexia and VAZ-2110 are identical in size (to the left of the VAZ-2110, to the right of the native of the Nexia), so the replacement is not very difficult

The VAZ-2110 is equipped with a BOSCH gasoline pump, as you know, the reliability of the products of this company is beyond doubt. Such a gas pump costs 700-800 rubles, a mesh filter for it is about 50 rubles. - prices are much more pleasant than prices for regular spare parts

The only thing that will have to be slightly modified is the lower rubber band of the pump and the power supply terminal

As for the power supply terminal, the question is as follows. The power contacts on the original Nexia fuel pump connector and the VAZ-2110 fuel pump connector are different - on the Nexia pump, the “minus” contact is thin, and on the VAZ-2110 pump, both power contacts are the same. Therefore, you will need to purchase a female terminal of the required size

In my case, there was already a small wiring with a terminal of the desired size

And one more remark. The fuel pump must be positioned so that the mesh put on it “looks” with its wide side down and forward (relative to the car).

Time spent on rework - 30 minutes. The only drawback is that the mesh for the "BOSCH" fuel pump is single-layer, and the original Korean mesh had two walls (coarse and fine cleaning). But a huge plus is the price of 750 rubles.

A car with a VAZ petrol pump works absolutely fine, the performance and pressure of the petrol pump is enough!

Symptoms: the car will not start, there is no pressure in the power supply system, the car does not develop full power.

Tools: set of heads, set of open-end and spanner wrenches, pliers, hammer, screwdriver.

1. Disconnect the negative wire terminal from the battery.

2. Relieve the fuel pressure in the system.

3. Remove the rear seat cushion.

4. Unfasten the plastic cap.

5. Disconnect the terminal block from the petrol pump.

6. Disconnect the fuel hose from the pump by opening the clamp with a screwdriver.

7. Remove the bolts securing the flange to the filler neck.

8. Remove the complete fuel pump assembly. Inspect it for wear or clogging. Replace the pump if necessary.

9. Install the new pump upside-down.

10.Before attaching the plastic plug, turn on the ignition and inspect the pump for fuel leaks.

Daewoo Nexia is a car that meets modern requirements for safety, quality, efficiency, dynamism, design and manufacturability. To maintain the high technical characteristics of the Daewoo Nexia car, like any other car, preventive maintenance and repairs are required during the operation.

There are complex malfunctions and failures that are recommended to be eliminated in the workshop conditions, but there are those that are completely removable directly by the car owner. Let's try to determine the feasibility of repairing a Daewoo Nexia car directly by the owner, without the help of car service specialists and the possibility of carrying it out in full compliance with the technological maps and regulatory documents of the manufacturer.

Daewoo Nexia engine failures, up to the inability to start, are often the result of a malfunction in the fuel system. The probable cause of such violations may be a malfunction of the fuel pump.

The design of the fuel pump allows you to restore its functionality. For this, it is recommended to perform technological operations:

  • dismantling the fuel pump from the car;
  • dismantling the hose;
  • dismantling the fuel pump from the bracket.

Let's move on to the next operation:

There is a structural recess in the center of the cover, which serves as a support for the motor shaft.

We perform the following operations:

  • production of a metal plate with a thickness of about 2 mm (by the size of the recess);
  • placing the plate in the recess on the lid.

If, as a result of the operations carried out, it was not possible to achieve the desired result, then it is possible to use an appropriate structural element from GAZ or VAZ cars.

Image - Do-it-yourself Daewoo Nexia fuel pump repair

Increased brake pedal travel, as well as its "softness" indicates a lack of tightness in the brake system. In this case, the brake master cylinder must be replaced or repaired.

  • special wrenches designed for unscrewing the brake cylinder pipe fittings;
  • a pear or syringe for pumping out the brake fluid from the reservoir;
  • pliers;
  • screwdriver.
  • selection of brake fluid from the reservoir (using a pear or syringe);
  • release of brake pipe fittings from the cylinder and rear wheel pressure regulators (key 22 is used);
  • unscrewing the nuts securing the cylinder to the brake booster;
  • disconnecting the brake pipes from the cylinder.
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It is not very difficult to carry out self-assembly - a new master brake cylinder.

  • removing the sealing ring from the brake cylinder;
  • removing the retaining ring (using a screwdriver);
  • removing, lubricating the cuff with brake fluid and replacing the installed brake cylinder component parts with new parts;
  • fixation with a retaining ring;
  • disconnecting the rear wheel adjusters from the brake cylinder;
  • disassembly, rinsing, cleaning of regulators from contamination;
  • assembly and installation of pressure regulators on the master cylinder.

When disassembling and replacing component parts, the main thing to remember is the order of their assembly, otherwise there will be problems with their installation in their original place.

Do-it-yourself Daewoo Nexia repair requires the mandatory observance of some rules:

Before carrying out maintenance or repairs, disconnect the battery earth cable, taking all appropriate precautions. This will prevent the occurrence of a short circuit and, as a result, the occurrence of dangerous situations that pose a threat to the health and life of the car owner, leading to damage not only to the battery, but also to the car.

When dismantling the air cleaner, after completing the process, it is recommended to close the intake pipes in order to exclude the possibility of ingress of objects that cause engine failure.

  • dismantling the steering column;
  • unscrewing the bolts fixing the switch (using a hammer and chisel);
  • installation of a new ignition lock (in reverse order). In this case, the fastening bolts must be replaced with new ones.

If the economic component of Daewoo Nexia repair is important to you and you have the necessary knowledge of the technology for carrying out the relevant types of work, then doing the repair yourself will not be a big deal for you. It is enough to be self-confident, have a special set of tools and free time. We hope that our article has become informative and useful for you.