Electric Fuel Pump Installation Pictures
ELECTRIC FUEL PUMPS. P/N 12-801-1, 712-801-1, 12-802-1, 712-802-1, 12-815-1, & 712-815-1. FUEL PRESSURE REGULATORS. P/N 12-803, 12-501, 12-804, 12-500, & 15812NOS. Installation Instructions. THESE INSTRUCTIONS MUST BE READ AND FULLY UNDERSTOOD BEFORE BEGINNING THE. In an effort to make the 240z more reliable, I've decided to upgrade to an electric fuel pump and then retire the mechanical pump. As you can see from the picture below, I inserted a 'T' joint to allow me to keep the current oil pressure gauge (second picture) as well as the new safety switch.
BMW 325i Sedan (2006) BMW 325xi Sedan/Wagon (2006) BMW 328i Coupe/Conv (2007-13) BMW 328i xDrive Coupe (2009-13) BMW 328i xDrive Sedan (2009-11) BMW 328i xDrive Wagon (2009-12) BMW 328i/xi Sedan (2007-11) BMW 328i/xi Wagon (2007-12) BMW 328xi Coupe (2007-13) BMW 330i/xi Sedan (2006) BMW 335d/i/xi Sedan (2007-11) BMW 335i xDrive Coupe (2009-13) BMW 335i xDrive Sedan (2009-11) BMW 335i/is Coupe/Conv (2007-13) BMW 335xi Coupe (2007-13) Parts Required: Fuel pump, fuel pump sealing O-ring Hot Tip: Check and clear fault codes when done using a BMW scan tool. Performance Gain: Restoring engine performance Complementary Modification: Replace fuel pump if faulty. Need to buy parts for this project? A faulty fuel pump can cause poor engine performance and hard starting problems. When they fail completely you may be left with an engine that doesn't start.
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). If the correct voltage is present, but pump does not activate, it is likely faulty. Use the DVOM in conjunction with a wiring diagram to determine the correct terminals for testing. You can access the fuel pump electrical connector and terminals under the rear seat cushion, below an access panel. On E90 models, a fuel pump control module is used in place on the fuel pump relay. 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. 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.
When testing, I usually see about 10 volts being sent to the fuel pump. In this tech article, I will go over how to test fuel pressure and volume.
You will need an assistant to press the Start Stop button during the testing procedures. The fuel pump is located in the right side of the fuel tank. Figure 3 Next, start or attempt to start engine. Fuel pressure should be 5 bar (72.5 psi).
Once you test pressure. Recharge fuel system by cycling key or running fuel pump, note fuel pressure. Then allow fuel system to sit under pressure for 15 minutes. Pressure should drop no more than 0.5 bar in that time period.
If it drops you could have a faulty fuel pump check valve or a leak in the fuel system. Electrical testing Working in rear of vehicle interior; grab corner of rear seat cushion and pull up to detach locking tabs. . Figure 9 I suggest load testing using a test light and a DVOM. Connect DVOM across fuel pump electrical connector terminals and take a reading, it should read battery volts when key is turned ON. Etzel Walker Stanton 14th Edition Marketing Companies on this page.
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. Your reading should hold steady, a maximum drop in voltage of 0.5 volts is OK. Anything more is a problem. In this photo, voltage head steady at current fuel pump demand. . This site was designed and produced solely by Pelican Parts. Pelican Parts is not associated with Porsche Cars North America in any manner, except for a mutual appreciation and love of the cars. 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.
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