We will email you instructions to reset it. If you have a feeling that there is something wrong, checking your transmission fluid will help you test out your concerns. A bad fuel pump will have low pressure on both sides. Two of the most common causes of diesel fuel pump failure are consistently low gasoline and engine breakdowns.

If start to hear a rattling sound while driving, you should stop to check the transmission. The fuel pump's job is pretty self-explanatory: to pump fuel from the gas tank to the engine. In extreme cases, it can result in the scary sight of smoke being emitted from the engine. Driving down the road, minding your own business and suddenly your car takes off like it has a mind of its own, has this ever happened to you? Squeaks, squeals and other high-pitched sounds: If your vehicle starts squealing or making unusual, high-pitched noises, this could be a sign that your diesel fuel pump is going bad. It happens because when the fuel pump starts to fail, the parts will wear out at different rates creating a mismatch of combustion that causes the pressure in the engine to be inconsistent. Your email address will not be published. This might sound like surging, but it is a little different. It's important to familiarize yourself with the warning signs of a faulty fuel pump—that way you can address any problems before it's too late. I will be using HPFP for short. Required fields are marked *. the pressure generated by the fuel pump in your fuel tank (picture to the right). These symptoms include the engine being hard to start, or not starting at all, rough or lumpy running at low RPM, a lack of power, and black or white exhaust smoke. See the steps we are taking. However, if the filter fails to keep particles out, the transmission fluid will quickly reach a point where it is too dirty to do its job efficiently. Window Motor Regulator & Window Power Switch Replacement. If this fuel pump begins to malfunction, then your BMW will not run as efficiently as you are accustomed. This is a piece of machinery that compress the fuel that is supplied into the fuel pump in order to bring up the pressure to the required high pressure. High pressure fuel rail: Takes the pressurized fuel and delivers it to the fuel injectors. Save my name, email, and website in this browser for the next time I comment. We have just sent you an email. Your email address will not be published.

This high pressure is needed when injecting fuel directly into the combustion chamber to ensure that the engine runs efficiently. We have had cars driven in with a bad HPFP, as well as towed in. Have you ever tried to start your car and the lights all come on and you can hear the engine trying to turn over, but nothing happens? Common Rules for Sharing the Road with Truckers. It's important to familiarize yourself with the warning signs of a faulty fuel pump—that way you can address any problems before it's too late. We are unable to add items to your cart from two different locations. 1. This stutter or jerking is caused by the failure of the fuel pump to inject fuel into the engine consistently due to the irregular pressure in the pump. Routine vehicle maintenance includes several different jobs your vehicle needs done to ope…, Learn how to choose the best tires for your lifestyle, how to fix a flat, signs of tire wear, and…. It remains low at 4 to 5 bars, i.e. When you are burning more fuel than necessary the fuel pump to put in more work in order to keep up. There are a variety of factors that can cause problems with your fuel pump, and depending on the symptoms that they pump is showing, it may or may not be easy to figure out exactly what the problem is and find a relevant solution. Your car is the sum of it’s many, many parts. One problem that you are more than likely to experience with your BMW is the high-pressure fuel pump failing. Engine Sputters at High Speeds. Check the transmission fluid regularly, not just for its level, but to see if it is clean.
This is called surging; this is when the car accelerates even when you have not pressed the gas pedal. So it's a no-brainer that a malfunctioning fuel pump is bad news. Most symptoms of problems in a modern common rail diesel system are associated with low fuel pressure in the rail.

The only way to truly tell is to place a fuel pressure gauge on both sides of the line and get a reading from both.
Different pumps naturally make different sounds, but over time you should be able to adjust to these noises while you drive. The fuel pump's job is pretty self-explanatory: to pump fuel from the gas tank to the engine. Call 1-800-PEP-BOYS (737-2697), We are here for our customers, Team Members and neighbors. The transmission filter is there to keep contaminating particles out of the transmission fluid. The HPFP did not obey the instruction which denotes a failure. These inconsistencies can cause a surge, which can be very dangerous when driving.


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