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Fuel System Issues

Any car can be crippled with a fuel issue and it doesn’t matter how well you care for your car. The main issue to remember it may not always be the fuel pump or fuel pump assembly that is to blame. Many people get the news that their engine is not getting enough fuel and assume a fuel pump issue. In fact most mechanics will give the old “fuel pump don’t work” but believing this can be an expensive mistake. There are many parts in the fuel system that can cause an issue from leaking to low pressure.

If the fuel pump is bad there will be no pressure coming from the pump even if the mechanic were to hook direct power to the unit. A low pressure system may be caused by a blockage in the system or even low voltage from the alternator. A major cause of fuel issues is the FPR or fuel pressure regulator which is a unit that controls the flow of fuel to the injectors. If this unit were to function incorrectly it would cause low fuel pressure at the injectors and the car would have issues running and starting.

Cracks in the fuel lines and bad seals in meeting points can cause fuel leaks that can not only cause low pressure in the fuel system but can also be dangerous due to the highly flammable nature of the fuel. If there is a fuel leak in the system it could be caused by old dry rotted line or cracks in the system from impacts of rocks and other debris from the road.

If the issue is tracked back to the fuel pump it may be a much smaller issue than the whole pump. If the wiring has a short and cannot get the proper voltage to the pump then the electric motor cannot function at full power and will not provide the correct pressure. Sometimes the voltage sent from the alternator is just too low and cannot power the pump unit enough. In the end it is better to check out the cause of the issue then just throwing in new parts and hoping it fixes the issue.

For more infomration on fuel systems, CLICK HERE to check out our Repair Fuel Pump Parts page in our How To section.

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