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Auto parts section for Fuel supply system

Fuel supply system car spares for Top Car brand
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Fuel supply system car parts - all important information about operating method, mounting, diagnostics and service life

A vehicle’s fuel system is designed to store and filter fuel, as well as supply it to the engine cylinders. Engine stability and performance depend on it.

Design of the fuel system

The fuel systems of various vehicles may differ. The main differences lie in the way the fuel is injected. Nevertheless, every vehicle has a tank to store fuel, a filter to purify it, a pump to supply it to the engine, delivery and return pipelines, and sensors which monitor, among other things, fuel level and other parameters.

Petrol vehicles may have the following types of fuel injection:

  • Single-point fuel injection (SPI). A single injector supplies fuel into the inlet manifold. This is where the air-fuel mixture is formed.
  • Multipoint fuel injection (MPI). There is an injector for each cylinder in the system. The fuel supply line is divided with the help of a special fuel distributor.
  • Direct fuel injection. This includes a high-pressure line with another pump and a fuel rail. Fuel is supplied directly to the combustion chambers under high pressure.
  • Combined fuel injection. Such fuel systems are equipped with high and low pressure fuel rails. High-pressure fuel injectors are installed into combustion chambers, while the low-pressure ones are built into the inlet manifold. The control unit selects the method of fuel supply depending on the engine operating mode.

The following types of injection systems are common in diesel vehicles:

  • High pressure fuel pump. Fuel is supplied to the injectors via high pressure pump.
  • Unit injectors. They ensure a layered injection of the fuel right into the combustion chambers. These components are driven by the camshaft.
  • Common Rail. This encompasses a rail and a high-pressure fuel pump. The injectors are installed in the combustion chambers and are connected with the rail via a high-pressure pipeline.

Maintenance tips

  • Refuel your vehicle at reliable filling stations. This will help you avoid corrosion and deposits in the fuel system, as well as to avoid the contamination of its components.
  • Replace fuel filters on time. If the throughput capacity of a filter is restricted, all components of the fuel system are exposed to severe strain.
  • Keep your fuel tank at least half full, especially during cold weather. Otherwise, the condensation may cause difficulties with starting the engine. Sometimes tanks begin to rust.
  • Every six months, add a special additive to the fuel tank to remove moisture. This is an excellent preventive measure which will help to extend the service life of the system’s components.
  • Regularly clean the injectors. In some cases, you can use a special additive for that purpose. However, it is much more effective to have them cleaned at a car repair shop.

Signs of malfunction

Difficulties when starting engine or reduced engine power can be caused by a diminished performance of the fuel pump. Engine malfunctions in every mode is a sign of a clogged filter. The same symptoms can be observed when the return pipeline is deformed, but in this case, the problem is accompanied by increased fuel consumption. The smell of petrol, coloured puddles beneath your car after parking, and significantly increased fuel consumption are symptoms of a leaky fuel system. Clogged injectors may result in engine misfiring, unusual sounds, and jerky movements while driving.

Causes of malfunction

These problems mostly occur due to fuel that is low in quality or contaminated. It contains particles which clog the filter and other system components. As a result, the pump can break down. Water is also harmful, especially, for diesel engines: The components of the fuel system are made of materials prone to corrosion. This may cause moving parts to jam. Furthermore, the throughput capacity of the injectors and pressure regulator is impaired.

Autodoc.co.uk: Only high-quality automotive products

You can always buy high-quality fuel system components for your vehicle in our online shop. They are offered at affordable prices. Additionally, you have an opportunity to save on delivery.

Top 10 of best sellers from the Fuel supply system section
Recommended spare parts from the Fuel supply system section. These are the sales hits. Buy our best sellling items or discover a vast selection of other attractive offers.
-25%
Lambda Sensor 0 258 017 025 buy 24/7!
Lambda Sensor 0 258 017 025
Article number: 0 258 017 025
£ 80,58
incl. 20% VAT, excl. delivery costs,
  • Overall Length [mm]: 1000
  • Number of circuits: 5
  • Recommended replace interval [km]: 250000
  • BOSCHLambda Sensor
  • Item number0 258 017 025
  • Manufacturer's suggested retail price £ 107,44
  • Our price £ 80,58
  • Condition  New
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Lambda Sensor DOX-0109 buy 24/7!
Lambda Sensor DOX-0109
Article number: DOX-0109
£ 35,73
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  • Thread Size: M18x1.5
  • Cable Length [mm]: 750
  • Number of Poles: 4
  • Product line: Universal fit
  • Quality: OE
  • Weight [g]: 103
  • DENSOLambda Sensor
  • Item numberDOX-0109
  • Manufacturer's suggested retail price £ 47,64
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  • Condition  New
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-25%
Injector 0 280 155 968 buy 24/7!
Injector 0 280 155 968
Article number: 0 280 155 968
£ 44,27
incl. 20% VAT, excl. delivery costs,
  • Fuel Mixture Formation: Petrol Injection
  • Static flow rate at 3 bar, medium N-Heptane [g / min]: 310
  • Resistance [Ohm]: 12
  • BOSCHInjector
  • Item number0 280 155 968
  • Manufacturer's suggested retail price £ 59,03
  • Our price £ 44,27
  • Condition  New
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-25%
Fuel filter WK 842 buy 24/7!
Fuel filter WK 842
Article number: WK 842
£ 9,79
incl. 20% VAT, excl. delivery costs,
  • Filter type: Screw-on Filter
  • Height [mm]: 156
  • Diameter [mm]: 81
  • Outer diameter 2 [mm]: 70
  • Thread Size Exit: M 16 X 1.5
  • Inner diameter 2 [mm]: 61
  • MANN-FILTERFuel filter
  • Item numberWK 842
  • Manufacturer's suggested retail price £ 13,05
  • Our price £ 9,79
  • Condition  New
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-25%
Lambda Sensor 0 258 006 924 buy 24/7!
Lambda Sensor 0 258 006 924
Article number: 0 258 006 924
£ 67,52
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  • Overall Length [mm]: 325
  • Number of circuits: 4
  • Recommended replace interval [km]: 250000
  • BOSCHLambda Sensor
  • Item number0 258 006 924
  • Manufacturer's suggested retail price £ 90,03
  • Our price £ 67,52
  • Condition  New
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-25%
Sealing Cap, fuel tank 45550 buy 24/7!
Sealing Cap, fuel tank 45550
Article number: 45550
£ 11,36
incl. 20% VAT, excl. delivery costs,
  • Colour: Black
  • Material: Plastic
  • Weight [kg]: 0,06
  • for OE number: 16 11 7 222 330
  • FEBI BILSTEINSealing Cap, fuel tank
  • Item number45550
  • Manufacturer's suggested retail price £ 15,14
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  • Condition  New
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-25%
Injector Nozzle 5WS40148-Z buy 24/7!
Injector Nozzle 5WS40148-Z
Article number: 5WS40148-Z
£ 269,99
incl. 20% VAT, free delivery
  • Part number of recommended accessories: X11-800-002-004Z, X11-800-001-001Z
  • Observe the vehicle manufacturer specifications
  • Supplementary Article / Supplementary Info: 35
  • Fuel Type: Diesel
  • Always compare old and new part (in particular OE No.)
  • VDOInjector Nozzle
  • Item number5WS40148-Z
  • Manufacturer's suggested retail price £ 359,99
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  • Condition  New
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-25%
Lambda Sensor DOX-0261 buy 24/7!
Lambda Sensor DOX-0261
Article number: DOX-0261
£ 93,35
incl. 20% VAT, excl. delivery costs,
  • Thread Size: M18x1.5
  • Cable Length [mm]: 510
  • Number of Poles: 4
  • Product line: Direct Fit
  • Quality: OE
  • Weight [g]: 100
  • Manufacturer Restriction: DENSO
  • DENSOLambda Sensor
  • Item numberDOX-0261
  • Manufacturer's suggested retail price £ 124,46
  • Our price £ 93,35
  • Condition  New
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-25%
Control Valve, fuel quantity (common rail system) 0 928 400 487 buy 24/7!
Control Valve, fuel quantity (common rail system) 0 928 400 487
Article number: 0 928 400 487
£ 87,72
incl. 20% VAT, excl. delivery costs,
  • Fitting Position: High Pressure Pump (low pressure side)
  • BOSCHControl Valve, fuel quantity (common rail system)
  • Item number0 928 400 487
  • Manufacturer's suggested retail price £ 116,96
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  • Condition  New
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-25%
Fuel Pump 0 580 464 070 buy 24/7!
Fuel Pump 0 580 464 070
Article number: 0 580 464 070
£ 74,71
incl. 20% VAT, excl. delivery costs,
  • Operating Mode: Electric
  • Fitting Position: Fuel Line
  • Fit: Universal
  • BOSCHFuel Pump
  • Item number0 580 464 070
  • Manufacturer's suggested retail price £ 99,61
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  • Condition  New
Details