There’s a leak in my fuel pump, in between the fuel line and pump.
I bought a generic nylon fuel line repair kit thinking that would solve the problem but it didn't so I check more throughly and it's the connection between the pump and the fuel line that's bouncing back so it's leaching trough the connection not the house I'm not sure what it could be any help would be greatly appreciated
My car has 95000 miles.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
Hello and thank you for contacting YourMechanic. Pressurize the fuel system and check all of the lines for any fuel leaking. Then clean off the lines and use a flashlight to check for any pin holes or cracks on the lines (if they are plastic lines). Check any connections that connect one hose to another and make sure that the connections are tight. Check the mounting surface to the fuel pump and ensure that the pump is not leaking from the fuel tank. Replace any fuel line that is leaking or cracked. If you need further assistance fixing your vehicle, then seek out a professional, such as one from YourMechanic, to help you with a fuel leak inspection. Best of luck.
How to Identify and Fix Common car Problems ?
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There are only two hoses running from the pump. One is the high pressure line, which sends fuel to the injectors. The other is the return line, which dumps fuel that the injectors don`t use back into the tank.
The fuel pump can experience internal leakage or loss of pumping efficiency causing slower pressure rise in the fuel rail.
If you notice gas leaking from the bottom of your car when you fill up, it`s most likely coming from the fuel tank vent hose. This hose is responsible for allowing air to enter the fuel tank as it`s being filled up, and if it`s damaged or not properly connected, gas can leak out.
Leaks can be caused by corrosion in steel pipes, and cracks and abrasion in all types. The clips holding the pipe to the chassis may damage it, or they may rust and fall off so that the pipe becomes loose.
The supply hose is connected to the fuel filter. The return hose is connected to the top of the fuel tank. The vapor return hose is connected to the charcoal canister.
A lawn mower fuel line hose and a fuel injection hose may look the same, but they are worlds apart. A fuel injected engine runs at a much higher fuel pressure than a carbureted one does. So, if your vehicle is fuel injected, you need fuel injection hose.
Fuel pump leaks can negatively influence fuel consumption and could cause a fire in the engine compartment. Fuel pump leaks can also result in insufficient fuel pressure resulting in lack of engine power. With increasing fuel injection pressures, larger leak rates will be generated by the same size leak hole.
For a simple but efficient fix, cover the leak with epoxy putty. If you`re looking for something stronger and more permanent, you could weld the leak shut. Welding requires you to drain the tank and clear it completely of fumes.
With a fuel leak, a car is never safe to drive.
In addition, leaks in the fuel system are a common cause of car fires. Since gas is extremely combustible, it is possible that it may spark a fire, either inside the car or elsewhere, if it leaks. Therefore, fixing the leak as soon as possible is highly recommended.
In modern vehicles, the most common causes for fuel leaks are the fuel lines and their fitting which may be damaged or crack due to normal wear and tear. Fuel tank leaks are also common since they can be damaged or begin to corrode. The fuel injection system could be a source of fuel leaks as well.
Permatex Thread Sealant with PTFE (Polytetrafluoroethylene) is an economical general-purpose fitting sealant that seals and resists pressure in air, oil, diesel fuel and hydraulic systems, outperforming tapes and pipe dopes.
Most cars come from the factory with Metal Lines because they hold up better than any soft material. They are usually made from stainless, aluminum or coated steel tube. Metal is the best material for fuel lines.
It`s hard to deny that rubber hose is still a popular choice for many homebuilt fuel systems. It is relatively inexpensive and very easy to install. Compared to other options such as rigid aluminum tubing, it has one major shortcoming: It has limited life and cannot be considered a permanent part of the airframe.
Although hoses for water spraying, air and chemicals are made out of many different materials, those for fuel gas and kerosene are almost all made out of rubber. Can PVC and other plastic hoses be used for fuels and gas? In short, the answer is no, they cannot.
Required fuel pressure can vary depending on your vehicle`s engine and fuel system. Carbureted engines may require as little as 28 kPa (4 PSI), while modern multipoint fuel injected high-performance engines can require as much as 414 kPa (60 PSI).
Line Dancing
In fuel-injected systems, fuel feed line pressures can be as high as 120 psi so it`s best to make sure that the lines and connections in your system are up to task. High-pressure rubber fuel injection lines are readily available, but they can also be replaced with steel-braided lines for added strength.
a bad or failing fuel pump can result in an air/fuel mixture that is lean (too much air, not enough fuel). this can result incomplete combustion, otherwise known as a misfire.
A fuel system should be carefully tested for pressure, volume, and electrical integrity before condemning the fuel pump.
Fuel Leak Classification
Four basic classifications are used to describe aircraft fuel leaks: stain, seep, heavy seep, and running leak.
Fuel tank leaks are classified as belonging in one of four categories, depending on the size of the wetted area around the leak. They are, in order of increasing severity, slow seep, seep, heavy seep, and running leak.
A gas leak may be caused by a hole in the gas tank, damaged fuel lines, damaged fuel injectors, gas tank cap issues, gas tank vent hose issues, or fuel pressure regulator issues, among other problems.
To choose the appropriate thread sealant, look for its chemical resistance to fuel (diesel or gasoline) or oil running through the line. Backyard mechanics will tell you they`ve used regular old gas resistant teflon tape (yellow stuff) with success. This is not recommended because it risks breaking free.
Permatex PermaShield Fuel Resistant Gasket Dressing and Sealant is a polyester urethane sealant with strong resistance to gasoline and all other automotive fluids, making it excellent for a variety of applications, including oil pans, axle assemblies and fuel injectors.
If you`ve ever experienced a fuel pump failure, you`ve likely seen some of the problems that a worn-out fuel rail sensor will cause. Some fuel rail sensor failure symptoms include a drop in performance, rough idling or running, and difficulty starting the car. In some cases, it may also send your BMW into limp mode.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
I have a 1981 e-350 with dual fuel tanks the p.o. added a third tank and 3 electric fuel pumps along with sepparate gauges and swi
ANSWER : The switch you are referring to is vended with the required electrical and fuel schematic (I just looked in the box) that answers your installation question. If you want an advance view, here is a link as well. Yes, you need a return line and just refer to the aforementioned link. If you are retrofitting back to OEM, I strongly encourage you to buy the original Factory Service Manual (FSM). There are lots of details attending this system and obviously it is difficult to recount it all here. The FSM will make your life much easier and you can then make sure your installation is perfect. Alternatively, YourMechanic can dispatch a certified mechanic and perform the whole retrofit and check out if you desire. Just request and schedule a generic service such as fuel pump service and the mechanic will come to your location and estimate the parts and labor required. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.
Read Full Q/A … : There’s a leak in my fuel pump, in between the fuel line and pump.
Just replaced my fuel pump but its not getting any power tested fuel pump relay and fuel fuse both good tested the wires all good.
ANSWER : You need to look at the theft light on dash to make sure it comes on and goes off when you turn the key to the on position. If light comes on and stays on then your theft system is causing the fuel pump to not be engaged. I recommend you check the theft system and then scan the computer for theft system codes. You may need to reprogram the keys to work or you have an bad sensor for the ignition key in the steering column.
Read Full Q/A … : There’s a leak in my fuel pump, in between the fuel line and pump.
I had my key on and I pulled off the fuel line at the fuel pump gas came out got on the power plug now can’t hear the fuel pump w
ANSWER : Hello, thank you for writing in. The fuel pump likely has been shorted out due to the moisture. At this point you will need to replace the fuel pump, and possibly the fuel pump fuse/relay. With that being said, you can do some further electrical testing on the system to see how much damage was done. A surge in the system can cause failure across the circuit, however it usually stops at the fuse or relay. This is one of the safety features that the fuse is designed to help with. With a fuse to blow, more electrical components may be effected by the surge. The required testing can all be done at home with a voltmeter if equipped. If not equipped, you will want to seek professional assistance. Contact our service department if you find yourself in need of help.
Read Full Q/A … : There’s a leak in my fuel pump, in between the fuel line and pump.
I installed a new fuel pump, but the line from the pump to the carb is leaking at the flare fitting on the pump
ANSWER : Hello, thank you for writing in. The hardest part is done. Locating and noticing the leak is typically where people fail to follow through with their repairs. The flare on the line was likely bent or damaged. They are very sensitive to any kind of misalignment or slight damage. Try to reset the fitting and see if you can align it better. If not, then you will need to replace the line, or if equipped you can re-flare the existing line. Replacing the line is the most foolproof way to make the repair, but a flare set can often be rented from your parts store. The female end on the pump also needs to be inspected to make sure it was not the cause of the damage to the flare. For more help, contact our service department to schedule an appointment.
Read Full Q/A … : There’s a leak in my fuel pump, in between the fuel line and pump.
Replaced fuel pump. Car won’t start. 2002 Infinity I35
ANSWER : Hi there – the metal component you describe is a fuel check valve on the fuel return line. Its function is to maintain a small amount of pressure in the fuel system so that starting does not require the fuel pump to run very long before the engine will start. Having replaced the fuel pump and fuel filter, I would check fuel pressure while the car is running. This is to check the fuel pump relay for burned contacts that won’t support full electrical current to the pump, and for proper fuel pressure – a malfunctioning fuel pressure regulator could also restrict power and higher speeds if pressure is too low. I would recommend an inspection of the fuel system by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.
Read Full Q/A … : There’s a leak in my fuel pump, in between the fuel line and pump.
Engine crank, no coil spark, fuel pump does not kick in.
ANSWER : Hi there. There could be multiple issues causing your lack of spark problem, ranging from a minor electrical short in the main relay to an issue with your ECU. In order to know for sure, you should have a professional mobile mechanic complete an electrical problems inspection.
Read Full Q/A … : There’s a leak in my fuel pump, in between the fuel line and pump.
Fuel pressure
ANSWER : Hello,
You may want to try checking the fuel pump relay. The relay wires should have ground on two wires, power on one wire and switched power on another wire. To activate the fuel pump your ECU actually connects one of the ground wires to complete the circuit and send power to the fuel pump. If the wires all have power running through them, then it is likely you have a faulty relay. The wire coming from the fuel pump is the other ground wire. I would recommend having an expert from YourMechanic come to your location to diagnose your wiring as this can be very difficult and time consuming without the proper wiring diagram.
You may want to try checking the fuel pump relay. The relay wires should have ground on two wires, power on one wire and switched power on another wire. To activate the fuel pump your ECU actually connects one of the ground wires to complete the circuit and send power to the fuel pump. If the wires all have power running through them, then it is likely you have a faulty relay. The wire coming from the fuel pump is the other ground wire. I would recommend having an expert from YourMechanic come to your location to diagnose your wiring as this can be very difficult and time consuming without the proper wiring diagram.
Read Full Q/A … : There’s a leak in my fuel pump, in between the fuel line and pump.
Fuel EVAP line that runs under car is kinked how do I know if it is leaking? Also can I drive it like that if it’s not leaking?
ANSWER : Hi Ricardo. We answered your question earlier. However, if you didn’t receive the reply, here is what we stated earlier. In most cases, an EVAP leak will create an OBD-II trouble code. The best way to detect an EVAP leak is by having a professional mobile mechanic complete a check engine light inspection, they will be able to download the code and determine the source of the leak. That’s the best advice we can offer you. Thanks.
Read Full Q/A … : There’s a leak in my fuel pump, in between the fuel line and pump.
