Question 1

What precautions should be taken and replacing fuel injectors and fuel rail on Volkswagen Jetta?

Accepted Answer

When the fuel system has been opened it must be bled five-cylinder models to avoid damaging the catalytic converter. Each time the battery gets disconnected, there are a number of systems that have to be re-learned before they can be in good operation. The first thing to do is to take the pressure out of the fuel system and also to disconnect the cable to the negative terminal of the battery. Unscrew the engine cover and cover the fittings on the front of the engine with the shop rag to unscrew the fitting, and plug the supply line and the fuel inlet fitting. Removal of intake manifold, high-pressure fuel tube, and disconnection of fuel pressure sensor electrical connector are done in 1.4L, 1.8L, and 2.0L direct-injection engines. Clean the fuel rail and injection base to avoid debris getting into the engine and then unscrew the bolts and withdraw the fuel rail off the injectors. To be able to remove the injectors in the cylinder head, screwdrivers or angled needle-nose pliers can be utilized, and in case of tightness, a slide hammer with the correct adapter can be required. Any seals and support rings should be replaced whenever the injectors are removed, and the injector bores should be completely cleaned. Install the fuel injectors in the engine head avoiding to lubricate the Teflon seals; thereafter place the fuel rail on the injectors and tighten the bolts. To replace seals of the fuel injector, check and replace the top O-ring and old combustion chamber Teflon sealing ring and support ring of every injector, taking care not to ruin the seal groove. Install the new Teflon seals, spacer ring and lubricate the upper O-ring with clean engine oil using the tools which are included in the special injector tool set. When using non-turbocharged engines of 2.0L engines, loosen the harness on the fuel rail, unplug the connectors of the fuel injectors, clean the fuel rail and injector base, loosen the bolts connecting the fuel rail, and then remove the fuel rail carefully and the injectors. In case of 2.5L engines, the electrical connectors are to be disconnected, the fasteners of the fuel rail mountings are to be removed and the fuel rail and injectors are to be pulled off the intake manifold. Take out the retaining clip of every fuel injector, throw the old injector O-rings away and replace it with new injector O-rings, which must be coated with clean engine oil before fitting. Install every injector retainer clip and lubricate the lower injector O-rings with clean engine oil and place the fuel rail assemblies on the intake manifold, making sure that the mounting fasteners are firmly connected. Lastly, drain the fuel system and check the injectors to see whether there is fuel leakage.

Question 2

How to remove and install the fuel injector and fuel rail on Volkswagen Passat?

Accepted Answer

Relieve the fuel pressure to take out the fuel rail and the injectors. Once more, take off the engine cover (unless it is already removed) and label and disconnect all the vacuum hoses or any electrical wiring that are likely to prevent the removal of the fuel rail. Disconnect the vacuum hose to the fuel pressure regulator and then the fuel inlet line and the fuel return line to the fuel rail. Unscrew the electrical connector of fuel injectors, remove the wiring harness retainers that are on the fuel rail, and position the harness out of the way applying a numbered tag to each connector with the corresponding cylinder number. Take off all the debris surrounding the injectors and then loosen the fuel rail mounting bolts. Vigorously shake the fuel rail and injectors to loosen them and then detach the fuel rail and injectors together. Take out the retaining clip and the injection(s) inside the fuel rail group, making certain to take off the O-rings and dispose them. During the installation, grease the new O-rings with clean engine oil and insert the injectors into their respective bores in the fuel rail ensuring that the injectors are clamped in place. Install the injectors and fuel rail assembly onto the intake manifold making sure the injectors are fully seated before tightening the fuel rail mounting nuts to the required torque. Install the fuel lines connecting them with the electrical connectors to every injector with the help of the numbered tags. The rest of the installation is the opposite of the removal process. Once the injector and fuel rail assembly is installed, turn the ignition switch to the On position without turning on the starter to pump the fuel a few seconds creating fuel pressure in the lines and through the rail. Repeat this procedure two or three times, and examine whether there is any leakage of the fuel around the lines, rail and injectors.

Genuine Volkswagen Fuel Injector

46 Fuel Injectors found

Volkswagen Injector Part Number: 04L-131-113-Q

Volkswagen Injector Part Number: 3C0-131-113-C

Volkswagen Injector Part Number: 4H0-131-113-A

Volkswagen Injector Part Number: 06G-906-036-J

Volkswagen Injector Part Number: 04E-906-036-AL

Volkswagen Injector Part Number: 04E-906-036-Q

Volkswagen Injector Part Number: 7B0-906-031-A

Volkswagen Injector Part Number: 06A-906-031-AB

Volkswagen Injector Part Number: 06G-906-036-AH

Volkswagen Injector Part Number: 7B0-906-031

Volkswagen Injector Part Number: 021-906-031-A

Volkswagen Injector Part Number: 7B0-906-031-C

Volkswagen Injector Part Number: 037-906-031-J

Volkswagen Injector Part Number: 06K-906-036-M

Volkswagen Injector Part Number: 058-133-551

Volkswagen Injector Part Number: 06K-906-036-N

Volkswagen Injector Part Number: 06A-906-031-CK

Volkswagen Injector Part Number: 03H-906-036-R

Volkswagen Injector Part Number: 06A-906-031-BS

Volkswagen Injector Part Number: 07K-906-031-B

Volkswagen Fuel Injector

Volkswagen Fuel Injector Parts and Q&A

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