To confirm a pump can supply fuel pressure to the fuel rail, you can manually activate the fuel pump. Be sure that all test hoses are installed and routed properly.
On E90 models, a fuel pump control module is used in place on the fuel pump relay. Move away enough to access electrical connector on fuel pump module.
Join us in our BMW E90 Technical Forum Message Board and ask a question to one of our many automotive experts. Next, install the fuel pressure gauge connecting line (green arrow). Your reading should hold steady, a maximum drop in voltage of 0.5 volts is OK.
Fuse box in engine compartment. If the correct voltage is present, but pump does not activate, it is likely faulty.
The fuel pump is located in the right side of the fuel tank. The fuel pump module can be activated for testing using a BMW scan tool, if you do not have access to a BMW scan tool, attempting to start the vehicle will also activate the fuel pump control module, the module will send control voltage to the pump. Fuel pressure should be 5 bar (72.5 psi). All pictures and references to the Porsche name, and the car names and shapes are for restoration reference only, and do not imply any association with Porsche. Check out our complete Technical Article Directory for guides to many other procedures. Then connect an incandescent bulb style test light to battery ground and touch the test light probe tip the positive wire you are backprobing with DVOM. Now that you have access to the fuel pump terminals, you will connect your DVOM to the terminals by backprobing. Its causing hard start 3-6 … Additional fuses in passenger compartment. Anything more is a problem. When Start button is pressed, fuel pump will receive voltage for 3-5 seconds, if engine doesn't start. If it drops you could have a faulty fuel pump check valve or a leak in the fuel system. This site was designed and produced solely by Pelican Parts. Fuse box in engine compartment, right side. Next, start or attempt to start engine. If no voltage is found, check ground to fuel pump and fuel pump fuse F70 in the junction box. Instead of seeing what we are used to, battery volts supplied to the fuel pump, we now see a voltage dependent on fuel supply demand from the DME. Electrical testing Working in rear of vehicle interior; grab corner of rear seat cushion and pull up to detach locking tabs.
For qualified repairs, contact authorized service centers. Once you have removed the rear seat, peel the carpet away from the right side rear seat cushion area of body.
My 2008 BMW 328xi is NOT holing pressure after engine stop. In this tech article, I will go over how to test fuel pressure and volume. Remove access panel lid from body by lifting up. BMW E90 3-Series Technical Articles (2006-2011), Page last updated: Wed 10/28/2020 08:48:10 PM. Applies to: 325i (2006), 325Xi (2006), 330i (2006), 330xi (2006), 328i (2007-2009), 335i (2007-2009). The fuel pump is located under the back seat on the passenger side. See our tech article on Seats, removing. fuse box location.
The fuel pump is located in the right side of the fuel tank. Check out our Basic Maintenance section, which has all the parts you'll need to get your vehicle running its best, including filters, fluids, brakes, spark plugs, lighting, and more for your E90! Pressure should drop no more than 0.5 bar in that time period. When they fail completely you may be left with an engine that doesn't start. When testing, I usually see about 10 volts being sent to the fuel pump. (green arrow). Connect DVOM across fuel pump electrical connector terminals and take a reading, it should read battery volts when key is turned ON. Then allow fuel system to sit under pressure for 15 minutes. For informational purposes only. Use a fused jumper lead set to battery positive (+) and battery negative (-) and run pump. Home / BMW E90 320d Sedan / Repair Manuals and Technical Data / 13 Fuel preparation and control / 13 51 Injection pump, control section, mixture control unit / Special tools required: 11 8 740 For the BMW 3 series (F30/F31/F34) 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 model year. You will need an assistant to press the Start Stop button during the testing procedures. Once you test pressure.
Fuse box in luggage compartment, right side.
Consult authorized factory manuals when performing repair procedures.
You will find an access cover and will need to remove the screws. Use at your own risk. Double check the fuse number with your model specific information. Green arrow points to where positive (+) lead goes, Yellow arrow points to where negative (-) lead goes.
Pelican Parts is not associated with Porsche Cars North America in any manner, except for a mutual appreciation and love of the cars. Remove engine cover over fuel injectors. Fuse and relay box in engine compartment (type 2). SOURCE: Need location of fuel pump on a 1992 BMW 525i straight six engine.
Information and technical articles within this website are for reference only.
You will find an access cover and will need to remove the screws.
Got more questions? You can access the fuel pump electrical connector and terminals under the rear seat cushion, below an access panel.
First thing you have to do is remove the fuel test port cap. In this photo, voltage head steady at current fuel pump demand. Pelican Parts is not responsible for any typographical errors contained within the site.
I suggest load testing using a test light and a DVOM. Fuse and relay box in luggage compartment.
Press Start Stop key like you wanted to start the engine, allow engine to crank if it doesn't start, DVOM should read around 10 volts.
By entering this site, you agree to hold Pelican Parts free from any liability arising out of the use of any information contained within. June 19, 2018 : ... where is the fuel pump check valve. You should be able to listen for the pump while someone cranks the car. All trademarks are a property of fusesdiagram.com, Electronic automatic transmission (EAT) control unit, Oxygen sensor in front of the catalytic converter. Connect DVOM across fuel pump terminals. Green arrow points to where positive lead goes, Yellow arrow points to where black lead goes. ... Is it a similar procedure for testing the fuel pump on a 320d? Use the DVOM in conjunction with a wiring diagram to determine the correct terminals for testing. SOURCE: Need location of fuel pump on a 1992 BMW 525i straight six engine The fuel pump is located under the back seat on the passenger side. For the BMW 3 series (F30/F31/F34) 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 model year. If you suspect your fuel pump has failed, you can confirm the fuel pump is received the correct voltage when commanded ON by the fuel pump control module using a digital volt ohm meter (DVOM). (green arrows).
See our tech article onà engine cover removing. Then install the fuel pressure gauge. See our tech article onà engine cover removing.
http://www.pelicanparts.com/bmw/catalog/shopcart/TOOL/POR_TOOL_WTD049_pg10.htm.
Recharge fuel system by cycling key or running fuel pump, note fuel pressure.
(green arrow), Hold the carpet out of the way, and then remove four 10mm nuts from access panel. A faulty fuel pump can cause poor engine performance and hard starting problems.
You should be able to listen for the pump while someone cranks the car. Manufacturer does not assume any liability.
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