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Frequently Asked Questions

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To prevent fuel pump failure, always replace the fuel filter and clean the tank to reduce debris and contamination when replacing your pump. Addditionally, avoid extended periods of low fuel levels to help maintain the durability of the pump.

The fuel pump itself is covered under the warranty, however installation or related costs are not covered. See limited lifetime warranty PDF for terms and conditions.

Bosch developed Demand Controlled Fuel Supply (DECOS) and brushless fuel pump technology, which is used in Bosch fuel pumps. DECOS technology includes the reduction of fuel consumption, reduction in evaporative emissions and higher durability.

The high-pressure pump is supplied fuel by the electric pump.This pump generates the fuel pressure required for the high-pressure injector to provide optimum mixture of fuel and air directly into the cumbustion chamber.

The HPP is typically located off of the fuel rail.

Port injectors are positioned outside the combustion chamber – between the Mass Air Flow (MAF) Sensor and the intake valve, with the tip of the injector sitting outside, pointing towards the combustion chamber. With port fuel injectors, the air and fuel are combined outside the combustion chamber, in the intake manifold. From there the mixture flows through the intake tract and the intake valve to the combustion chamber.

If the vehicle experiences a hard start, no start, or an extended crank time; stalls or stalls intermittently; or exhibits a rough idle, poor acceleration, or vehicle stumble – it may be time to replace the fuel pump.

Yes! Bosch brings its fuel system expertise to the aftermarket with a premium fuel pump program for domestic, Asian and European vehicles.

Some of the top causes for fuel pump failure are contamination (which is caused by dirt and debris entering the system from re-fueling), overheating, and fuel pump wear over time. Frequently driving on a low fuel tank can accelerate wear on the fuel pump. An interesting note – over half of all fuel pump replacements are the result of mis-diagnosis. With the new complexity of modern vehicles, several things can disable the vehicle's fuel pump (e.g., security systems, oil/fuel pressure switches, etc.), which can result in a mis-diagnosis.

Many of Bosch aftermarket modules and pumps are made on the same production lines that service our Original Equipment Manufacturer – or OEM – customers.

Bosch Fuel Pumps are validated to E20, so you are assured a reliable performance to a standard that has been exceeding the new E15 allowance. Should the EPA expand the limitations again, the fuel pumps will already be validated.

Can you clean fuel injectors? Many injector testers have a cleaning function, which can eliminate some deposits. But cleaning multi-point and high-pressure injectors can cause: Failures from aggressive additives in the cleaning fluid Thermal damage to the solenoid as a result of incorrect triggering currents Voided warranty claims or part guarantees

Fuel injectors are an essential engine component. Malfunctions can lead to serious engine damage – which is why faulty injectors have to be recognized and replaced as quickly as possible. Only properly functioning injectors can provide motorists with an assurance of: Minimized fuel consumption Significantly improved starting performance Immediate acceleration Longer service life for exhaust components

While no maintenance is needed on injection components themselves, keeping fresh clean gasoline in the fuel tank and changing the in-line filter per the manufacturer’s recommendations are good practices.

Compared with high-pressure systems, the low-pressure system is less complex and more affordable. Thanks to its robust combustion process, gasoline port fuel injection also tolerates lower-quality fuel. The system’s maintenance-friendly design also reduces the overhead for system diagnostics.


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